As we covered
earlier today, Facebook has released a big chunk of its platform code as open source - using the CPAL (
Common Public Attribution License) for their main license. If you haven't been closely following the proliferation of open source licenses, this is probably a new one to you. As with any open source code, it's smart to understand your rights before you start depending on the new platform - especially since some of the provisions of the CPAL may surprise you.