Question about SIM card?

[Jempast]

I know that the iPhone is contracted to AT&T but has anyone tried a NON-AT&T sim card yet? If so did it work and what company did you get the sim card from?

[Platinum]

It wont work so I am not going to even bother.

[frviana]

I would like to know if someone tries.
BTW, I have just started a thread offering $50 for the first unlock. If you are interested sign-up. Maybe we get enough money to motivate someone to have it done quickly. I bet there are tons of people already trying.