A lot of people who use facebook also use Office so Microsoft Fuse labs have used Azure to provide Office document sharing between facebook users in much the same way as facebook users can now share pictures and videos.
I Simply went to http://docs.com and signed in with my facebook account to get started.
I then went back to facebook and clicked on the + on the tabs and select docs to get a docs tab..
and now I can create a document in facebook, in this case PowerPoint..
Notice I am now using Office 2010 web apps, although I could elect to open full fat office and edit the deck that way if I wanted to. Notice I also have all the usual facebook social tools to the right including privacy. I can also upload one I made earlier such as my SQL Server consolidation deck featuring some of my cartoons ..
I find this interesting for 3 reasons:
You can try all this yourself now which might be a welcome change from virtual farming on facebook!