This rumor is as thin as it gets, but the YouTube deal was also supposed to just be a rumor, so it's worth at least checking out.
Over at threadwatch, a poster said a "solid" source told him that Google was in talks to acquire Facebook for $2.3 billion, obliterating Yahoo!'s reported offer of $1 billion.
It sounds crazy, but there may be good reason to believe it. But there's also good reason not to believe it
Acquisition Alert Level: Blue
Completely speculative article here.