According to reports, Microsoft (NASDAQ:MSFT) is in discussions to take a stake in Facebook. Is Facebook a must-read for Microsoft investors? Should Google (NASDAQ:GOOG) and Yahoo! (NASDAQ:YHOO) try to get a piece of the Facebook action? And what do underpants gnomes have to do with this story? In this installment of Fool Video, Managing Editor LouAnn DiCosmo talks Facebook with Motley Fool analyst Seth Jayson.

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