AT&T has begun notifying its customers that it will launch MMS for iPhone soon. The company is sending a text message to customers that reads,
AT&T Free Msg: Picture & video messaging (MMS) will be available for iPhone on 9/25. While we prepare your account for MMS capability, the current "view my message" experience will be turned off but your ability to send and receive text messages will not be affected.
Sweet...
Works great, just updated to the 5.1 carrier file and all was good. I had already done the tether hack when I first got the 3gs so I did not have to enter anything after applying the file.
just google Dont wanna wait for iPhone MMS? Enable it right now! it is the first link. Worked fine for me, but your milage may vary.
Only 2 days early though, but I Was lucky enough that they had updated my account for the service on there end too.