Your comment makes no sense to me. If you're already on month to month, what's to stop you from signing a new contract with AT&T??? You could likely even get your # transferred to the new account. (if not, go sign up with t-mobile first, then transfer it back over and cancel the t-mobile for free).
Didn't they pass a law recently that you have to be able to transfer your number to a different carrier? I thought I heard something like that awhile ago, but maybe I'm just crazy.
TV being hacked. Granted its a little different situation but frankly I dont think they will fight it like Sony with PSP. And considering European market with som many different providers it would be overwhelmingly complicated to try to block your phone every time you connect it to your computer. No I think that we will see unlocking codes flying around very soon. At least I hope so 