Microsoft could be buying a 5% stake in Facebook, a move that would give the social networking site a value of more than $10-billion. 

The Wall Street Journal reports that Microsoft could be prepared to pay between $300-million and $500-million for 5% of Facebook.
Microsoft would be interested in the buy-in, in order to better compete with google – which is also reported as being interested in buying into Facebook.
Facebook, which began as a file sharing service for Harvard students, currently boasts about 39-million members.