There are a number of third-party apps that put MMS support on the iPhone but the iPhone 3G itself might come with native MMS support. Why Appleinsider thinks iPhone will finally have MMS, there are two reasons. First is an alleged internal memo from an AT&T customer service representative. The MMS featured is specified in the memo allegedly. Second is the curious fact that text messaging is not included in the iPhone 3G plan announcement. It'll be a welcome addition of course but not many people are particularly clamoring for it, especially after they got the 3G that they've always wanted on the iPhone.