Microsoft is FB main publisher for advertising services online.
in 2009 Microsoft online ad services made about 2billions in revenues.
FB claimed it made about 800 million in 2009. About 40% of Microsoft ads served on FB?
Sure the two companies have strong business relationships, but I don't think it will last long. Its probably is not profitable to Microsoft.
Unless FB goes public, it will then have money to survive, and Microsoft will skype will do really well. FB is about to run dry soon, the 500 millions from Goldman Sach will not last long...
If FB goes public, anything is good, if not, it will blow up. This might be just another publicity stunt to borrow more money and try to go public.
Anyhow,