After his amateur rocket flight in the desert (to 121,000 feet!), you asked rocket enthusiast Derek Deville about the project. Derek's responded to a selection of the best of those questions; read on below for his replies.

The Impossible Project, first mentioned here in 2009, has a goal that might be quixotic, but (despite the name) is looking ever more possible, after all: to bring back film for the millions of Polaroid instant cameras that have mostly become paperweights in the wake of the near-total discontinuation of instant film. This takes a sort of modern alchemy; the chemistry of instant film is tricky, and the knowledge had been dying out quickly. The Impossible team members didn't start from nothing, though: besides hiring a core of former Polaroid employees, they bought part of the former production facility in Enschede, the Netherlands, as well as production equipment. Now you can ask project founder Dr. Florian Kaps about the technical hurdles the project faces, as well as the motivations that led him to take on such a task. Note; though it's not all in stock right now, the project has successfully created various kinds of instant film, both monochrome and color. (If you have multiple unrelated questions, please post them separately.)

Earlier this month you got a chance to ask They Might Be Giants about DIY albums, nerd culture, and science songs. Below you'll find their responses. Thanks to the band for taking time to answer questions. I wish them another 30 years of making music and success!

Last week, you asked questions of "father of the Internet" Vint Cerf; read on below for Cerf's thoughts on the present and future of IPv6, standards and nomenclature, the origin of his beard, and more. Thanks, Vint!

Astronomer, author, columnist, and successful populizer of science Phil Plait, perhaps best known as The Bad Astronomer, is a regular sight on Slashdot for his unusual ability to find lucid explanations of esoteric scientific claims and controversies. Phil has graciously agreed to answer Slashdot readers' questions, so ask him below about space, science, debunking conspiracy claims, and anything else that makes sense. Asking more than one question is fine (and encouraged!), but please separate unrelated questions into separate posts, lest your questions be moderated down.

As co-designer of TCP/IP (along with Robert E. Kahn), and former chairman of ICANN, it is no exaggeration to say that Vint Cerf is certainly one of the fathers of the internet, and is often referred to as simply the father. His lifetime of network engineering accomplishments — meriting, among many other laurels, the Turing Award — leaves little doubt as to why he's now a full-time internet visionary for Google (and formerly with WorldCom) as well as a Google VP. Now, Cerf has graciously agreed to answer Slashdot readers' inquiries about the past and future of this little thing called the Internet, and his role in it thus far. This short call for questions is inadequate to sum up his contributions to engineering the data flows that entangle and enlighten us in 2011, but read through a few of these capsule descriptions to get a sense of them. In accord with the interview guidelines, please try not to lump together unrelated questions. (You may find that your questions are moderated downward if they aren't concise; if you have several distinct questions, simply submit separately as many as you'd like.)

You asked William Shatner questions, and Shatner replied. It's not the first time he's answered questions for Slashdot (that was in 2002), but Shatner's given a bit more insight this time into what makes an 80-year-old actor-author-sportsman-father-filmmaker tick as fast as ever. Did he mention that he's got a one-man show about to open? And a new album? Note: Typically Shatner, he's also chosen to ignore (or transcend) the usual Slashdot interview structure, and written his answers in his own style, which is why the format looks a little different from most of our interviews. Thanks, Bill. (Read on for his answers.)

A few days ago, we posted about Derek Deville's mind-blowing high-altitude rocket-launch in the Nevada desert. His 14-foot, GPS-equipped (four GPS units, actually) home-made rocket ("Qu8k") managed to hit 121,000 feet, an effort that took more than a trip to the store for more Estes "D" engines. Derek has graciously agreed to answer questions about Qu8k and other rocketry projects. Please confine your questions to one per post, but ask as many as you'd like.

A couple weeks ago, you asked questions of Stanford professor Jonathan Koomey about what has been dubbed Koomey's Law — the idea that the energy efficiency of computing doubles every 1.5 years. Read on for Professor Koomey's answers to the questions you raised.

He's Canadian, he's proven himself a successful comedic actor and writer, filmmaker, and musician, but (no matter what else he does) in many people's minds he will always be James Tiberius Kirk, captain of the USS Enterprise. Now, William Shatner has agreed to answer your questions. We'll pass on to him a selection of the best reader questions; you might want to read up on Shatner's official home page (and the Wikipedia link above) to knock out some of the most obvious ones. We'll pass on to him a selection of the best questions. Note: it's tempting to pile them on, but please try to follow the interview question guidelines by posting one question per post — ask as many questions as you'd like, though. Shatner is on vacation right now, but will work on answering your questions when he gets back.

Back in 1982, John Flansburgh, John Linnell, and a drum machine formed They Might Be Giants. Over the last 29 years TMBG have released 15 studio albums, won 2 Grammy Awards, and have become one of the most nerd-loved bands ever. In addition to projects like Dial-A-Song, TMBG were one of the first bands to create their own online music store, and have been making podcasts on a semi-monthly basis since 2005. The band has agreed to answer all your questions about the naming conventions of Turkish cities, building spiritual bird houses, and the music business. As usual, ask as many questions as you'd like, but please keep it to one question per post.

A few weeks back, we posted a story here that described Koomey's Law, which (in the spirit of Moore's Law) identifies a long-standing trend in computer technology. While Moore's prediction centers on the transistor density of microprocessors, Jonathan Koomey focuses instead on computing efficiency — in a nutshell, computing power per watt, rather than only per square nanometer. In particular, he asserts that the energy efficiency of computing doubles every 1.5 years. (He points out that calling this a "law" isn't his idea, or his doing — but it's sure a catchy turn of phrase.) Koomey has agreed to respond to your questions about his research and conclusions in the world of computing efficiency. Please observe the Slashdot interview guidelines: ask as many questions as you want, but please keep them to one per comment.

Attorney Jennifer Granick has defended many high profile hackers, including researcher Christopher Soghoian, creator of a fake boarding pass generator (2006); Michael Lynn versus Cisco/ISS (2005); Jerome Heckenkamp; and Luke Smith and Nelson Pavlosky in Online Policy Group v. Diebold Election Systems (now Premier Election Solutions), a copyright misuse case related to electronic voting. Granick also won an exemption from the U.S. Copyright Office in 2006 allowing phone unlocking despite the anti-circumvention provisions of the Digital Millennium Copyright Act, which set the stage for renewal of the exemption and for the jailbreaking exemption in 2009. At Stanford, Granick worked with Lawrence Lessig on constitutional copyright cases and taught six years worth of law students about computers, technology and civil liberties. While Civil Liberties Director at the EFF, Granick started the Coders' Rights Project and participated in litigation against ATT and the federal government for violation of surveillance regulations. Now an attorney at ZwillGen PLLC, Granick assists individuals and companies creating new products and services. And now, she's graciously agreed to answer your questions. Please, as usual, ask as many questions as you'd like, but confine each question to a separate post.

Last week you asked the Director of the Raspberry Pi Foundation, Eben Upton, about developing an ultra-low-cost computer and running a charitable organization. Below you'll find his answers. Thanks go out to a busy Eben for responding so quickly.

Last week, you asked Kevin Mitnick questions about his past, his thoughts on ethics and disclosure, and his computer set-up. He's graciously responded; read on for his answers. (No dice on the computer set-up, though.) Thanks, Kevin.

When Eben Upton isn't working as an ASIC architect for Broadcom, he is the Director of the Raspberry Pi Foundation. The foundation is a UK registered charity which exists to promote the study of computer science and related topics, especially at school level. Raspberry Pi plans to develop, manufacture and distribute an ultra-low-cost computer, for use in teaching computer programming to children. Their first product is about the size of a credit card, and is designed to plug into a TV or be combined with a touch screen for a low cost tablet. The expected price is $25 for a baseline Model A device, and $35 for a Model B device with integrated 2-port USB Hub, 10/100 Ethernet controller and 128MB of additional RAM. Eben has agreed to answer your questions about what it takes to make an ultra-low-cost computer, running an educational charity, or anything else. The usual Slashdot interview guidelines apply: ask as many questions as you want, but please keep them to one per comment.

Kevin Kelly ("Senior Maverick for Wired Magazine," among many other things) is back with answers to a selection of the questions posed to him by Slashdot readers. Read on below for his take on travel, the Long Now Foundation (including the 10,000-year clock — clocks! — that is among the foundation's projects), the future of fusion, and what to do about inevitable widespread suckage.

The hacker with perhaps the most famous first name around, Kevin Mitnick, has gone from computer hacking of the sort that gets one on the FBI's Most Wanted list (and into years of solitary confinement) to respected security consultant and author, helping people minimize the sort of security holes he once exploited for fun. His new book is called Ghost in the Wires: My Adventures as the World's Most Wanted Hacker; it's his first since the expiration of an agreement that he could not profit from books written about his criminal activity. Kevin's agreed to answer your questions; we'll pass the best ones on to him, and print his answers when they're ready. Note: Kevin also answered Slashdot questions most of a decade ago; that's a good place to start. Please observe the Slashdot interview guidelines: ask as many questions as you want, but please keep them to one per comment.

Kevin Kelly has for decades been involved in some of the most interesting projects I know about, and in his roles as founding editor (and now editor at large) of Wired Magazine and editor of The Whole Earth Catalog has helped spread the word about many others. Kelly is probably as close to a Rennaisance man as it's possible to be in the 21st century, having more-than-passing interest and knowledge in a range of topics from genetic sequencing and other ways that we can use measurement in pursuit of improved health to how technology is used and reused in real life. Among other projects, he's also the founder of CoolTools, which I consider to be (unsurprisingly) the closest current equivalent to the old Whole Earth Catalogs. (Disclaimer: I've had a few reviews published there, too.) (He's also one of the founders of The WELL, now part of Salon.) Kelly is also Secretary of the Board of Directors of the Long Now Foundation, the group which for years has been designing a clock to ring on 10,000 years in the future. Below, ask questions of Kelly, bearing in mind please the Slashdot interview guidelines: ask as many questions as you want, but please keep them to one per comment. He'll get back soon with his answers.

Last week, you asked questions (many rather pointed!) of Amir Taaki, co-founder of Bitcoin Consultancy, which develops Bitcoin related services, exchanges and Bitcoin itself. (They also own Britcoin.co.uk.) Says Taaki: "When creating video games I spent much time imagining tools to make artists lives easier, and how we could keep funding developers to write free software. One contribution of mine to the community was a site where developers could get funded for developing features and I'd love nothing more than to pay people to write free software." With regard to Bitcoin, similarly, "We need fulltime developers thinking about the problems and solutions needed to keep this system running. We aim to get all the creative thinkers from the community and provide a mechanism for enabling their work." Below find his answers to the questions readers raised.