We just saw a case that hinted at a new rear camera on iPod touch 4, now images from a parts supplier show what looks like a front, FaceTime camera hole.
this part is clearly marked as an Apple part "Apple (c) 2010". This stamp is visible in the full resolution image. The part is also stamped with April 29, 2010, indicating that the build date is relatively recent.
At WWDC 2010, Steve Jobs did say 10,000 FaceTime devices, not iPhones specifically, and we've seen how Apple/iTunes IDs instead of phone numbers could be used to connect the video calls, so the pieces do seem to be falling into place...
Do you want an iPod touch 4 with both a rear and front facing camera?