A Swedish company called Mobispine is currently developing a true MMS application for the iPhone. According to Mobispine, the application is still under development and has not been approved by Apple.

Our sister site, News.com, reports that Telia, Apple's carrier partner in Sweden, is planning to develop its own MMS (multimedia messaging service) application for the iPhone, according to a report ...

Big holes in the iPhone’s SMS/MMS functionality have been filled with two apps, SMSD and MMS. SMSD allows you to forward old SMS messages to new recipients, as well as sending new messages to multiple ...