you non believers need to do a little more research. the hyper sim method is well documented. the forums here do not represent - by a long shot - the best/brightest activity going on in the community, nor the sum total of knowledge out in the open about unlocking the phone.
oh, and to clarify an error someone posted above: jailbreaking does NOT provide a carrier unlock to the phone, it simply makes the iphone able to have additional apps installed, etc.
TM