Do you guys think you'll be able to use this tablet as a phone?
As much as you can use an iPod touch as a phone. Yeah Skype, maybe video conferencing if they have a camera, but if you catch yourself thinking about it as a phone, just picture holding a 10" tablet up to your face.
AT&T to provide a data-only SIM for this baby (cue anger and complaints about AT&T lock-in), I'm guessing followed by additional carriers "later".
(Edit: clarified data-only and lack of plausibility)