All of these threads are pointless. Either you installed a hacked carrier file or are jailbroken. End of story.
Yes, MMS may send for you but what good is that if a bunch of your other friends have iPhones as well? I know my wife, sister, and close friends aren't about to go installing hacked carrier files to their phone when all this is coming officially in a week.
Besides, I have a feeling everyone will go back to email once the "novelty" wears off.