It’s just a rumor. But hey, sometimes rumors turns real =D
According to Neowin (Not Neo from matrix you idiots!! And no! He doesn’t know kung fu… I do xD), Windows Phone 7 might have VoIP based face-time services\app and the picture above shows some Registry Keys that sort of predicts them.
Let’s just hope it gets linked to Windows Live so that will be one reason less to buy an iPhone 4 xD