Facebook and Microsoft have teamed up on a new online document-sharing service that will seamlessly integrate with the popular social networking site. Dubbed is currently in a limited beta phase, so anyone can view documents, but in order to edit or create new ones you'll have to join a wait list. Google has also been making a big push around online-document sharing, with a recent slew of updates to its free services and their paid Google Apps for Businesses offering becoming an increasingly popular alternative to desktop suites.