Photo Messaging Finally Comes To iPhone

AT&T says multimedia messaging (MMS) will be available on the Apple iPhone starting Sept. 25. The feature, which allows users to attach video clips and such to emails, will be enabled by a "software update on that day," says AT&T, the exclusive U.S. distributor of the iPhone.

Why wait? Two words: Network capacity. AT&T says smartphone growth, led by the iPhone, has resulted in an "explosion of traffic" on its wireless networks. According to AT&T, usage of its wireless networks is up 350% year-over-year over the past two years, and shows no signs of abating.  The company is adding extra equipment to handle the expected MMS load.