Nokia and Microsoft today announced the signing of a definitive agreement on a partnership, completed ahead of schedule, consistent with the joint announcement made on February 11.
Some other highlights from the announcement are not really knew, but at least offer some clarification:
Nokia will leverage mapping, navigation, language support and work on cameras; Microsoft gives Nokia Bing, gaming, ecosystem
Windows Phone developer registration free for all Nokia developers.
Nokia will open a new app store for all their software, including Windows Phone, giving their devs easy access to all of Nokia's customers
Nokia will also leverage their operator billing, expanding Microsoft's reach