okay, 3G iphone with hacked carrier file = working MMS since the 3.0 beta. Upgraded to 3Gs and lost the ability to use MMS even with the old trick. Official 3.1 release and my 3Gs is magically sending MMS again. Official release of MMS today and I lose it again!? Now I can send and receive MMS but only if I turn off Wifi!?!? Come on!