Apple Thoughts: Impatient for MMS on iPhone?

"AT&T is bringing Multimedia Messaging to the iPhone on September 25. But if you can't wait ten days or so, here's how to get it now."

This isn't a for sure workaround, as there have been reports that it doesn't work. However, if you are impatient and can't wait 7 days, and have some familiarity with the terminal, this how-to article walks you through how to add it to your iPhone now. 3G or 3GS only though!