If you've been waiting for a free iPhone software unlock program that will allow you to use any SIM with your unit, then AnySIM 1.1 might be what you're looking for. It's intended for "virgin" Apple iPhones.

Just so we're all on the same page here, a virgin iPhone is one that has not been modded or hacked before. This is a new unit which is working under normal conditions.

The iPhone Dev Team has tested AnySIM with 1.0.2 and 1.1.1 and it works on both. However, if you try to unlock q.0.2 then try to update to 1.1.1, your phone will end up being re-locked, amounting to nothing in the end.

If your Apple iPhone isn't virginal, there's no need to go out and buy a new one. The iPhone Dev Team is currently working on an app that will "revirginize" your Apple iPhone so you can use AnySIM on it.