iPhone 4.0 - Still Stuck with AT&T?

Gizmodo's capture of a iPhone 4.0 prototype offers a lot of hints about where Apple is going with the new iPhone. Here's a quick piece from Business Week about what some of the possible new features might mean for AT&T customers:

iPhone 4.0 Features Pose Questions

The biggest news would seem to be that the new iPhone's micro-sim slot will lock Americans into AT&T for another iPhone cycle. (Since AT&T is the only carrier offering micro-SIMs at this time.) But Uncle Bell's guess is Apple has some tricks up their sleeve and the new iPhone will be offered unlocked. And there will be support from other carriers for the micro-SIM, both on the new iPhone and the iPad.