According to a new Arstechnica report, a few iPhone users have had their MMS enabled via AT&T, a couple of weeks prior to the expected rollout launch date of September 25th.
AT&T delayed the MMS rollout to make sure the "network was ready to handle a record volume of MMS traffic." They also noted that if you already pay for SMS, MMS would be added free of charge.
Pic via Ars:












