My brother has a brand new iPod Touch 4G and his FaceTime doesn't work. On his end, he can see me on my i4 but, all I see is a blank, black screen. And in his "viewfinder" at the top right, all he can see is black, too. His first iPod Touch 4G worked great! We FaceTimed a lot because his daughter and my daughter are BFFs, and they live four hours away.
Out of nowhere, his FaceTime stopped working. He went back to the store of purchase and got his warranty. Brand new iPod Touch 4G...out of the box...FW 4.3.1 Build (8G4)...and still no FT!!