Looking at some news today when checking up on my stock positions I saw an article about this and found the following info quite amusing:

[snip] will provide its customers with an "unlock code" that will allow the phone to work with other wireless carriers, making it easier to switch service, according to a spokesman. The unlock codes will be provided starting in July. [snip]
[snip] although there remains notable exceptions including the iPhone, as well as several Blackberrys and phones running on Google Inc.'s (GOOG) Android operating system. [snip]
So in other word every important phone that keeps people with AT&T can't take their phone with them if they want to leave but everyone else can and apparently based on this info I guess AT&T doesn't care about the customers outside of the three specified platforms. LOL