AT&T has also announced that on its Facebook page that MMS for the iPhone will be updated through iTunes late Friday morning, Pacific Time. That means it should be ready in the early morning hours here in Hawaii.
For me, the earlier the better. I go on a trip to Portland this Friday and I need to be at the airport by 11:30 a.m. I hope to get the MMS update before I go. Although I'm not a big fan of MMS, I still would like to have the option. Before I had the iPhone, I used MMS once with my old dumbphone.