I was just wondering if there were going to be MMS apps added to the appstore. does AT&T have to be onboard with something like this, or can 3rd parties control all this?
AT&T must be on board with this to release a MMS app. Currently, the AT&T network blocks MMS messages to users with an iPhone. I almost guarentee no 3rd party apps will support this feature and the only way it will come out is through apple itself in a firmware update in the future.