Erica Sadun over at TUAW has confirmed that the 3G iPhone will work just fine without a voice and data contract by using any AT&T Pay-As-You-Go SIM card with a data plan. No pwning needed, Sadun says that popping the SIM into her brand new, right-out-of-the-box iPhone “Just. Worked.” So there you go.

Of course, you can’t buy a new iPhone without a contract, so file this under “just good to know”? Gizmodo ponders that this might be a fine thing to use for international trips, so it could be useful after all.

Getting an unlimited 5GB plan to a SIM is easy. Just call 611 and select “Buy Features” - “Media Net” - “Unlimited” - “Buy It”.

Wait a second, 5GB unlimited plan? Oh AT&T, you tricky little mega-corporation.