IPhone hack

I bought an 8GB iPhone today (20070811). I have 14 days to return it if I can't figure out how to unlock it. I have no intention of getting AT&T because #1, I don't do service contracts -- the AT&T iPhone contract is 2 years long! #2, I hate AT&T -- I got burned by them before. #3, I got to test a friends iPhone for quite a while over a period of weeks in many different locations in San Francisco and the conclusion is that Edge is completely worthless. The iPhone is fine on WiFi, but Edge turns out to be an annoyance. I would rather it not even try to connect to Edge and do nothing when it can't find WiFi.