MG Siegler (best TechCrunch Reporter) has a great read about speculating on the AT&T contract with Apple. Basically it is believed that at the end of 2010 no more iPhone exclusivity, but maybe getting Apple products first.
I have no clue. However I still stand by the fact that the iPhone on Verizon would be less than stellar. If you can’t get simultaneous data and voice on the iPhone, then there is no way I switch from AT&T, even though I dropped 3 calls already today.
Updated [5/10/10 @ 6:57pm]:
Engadget seems to think that it is still until 2012 unless they cancelled or modified it. The only reason this would happen is if Apple got out of it because of service quality issues, I doubt AT&T would want to shorten the deal.