Mobile Phone + Camera

I find SMS text-entry slow and painful, and belive it's popularity in Europe stems in large part from the high per-minute charges Europeans endure. But taking a picture with your phone and mailing it to someone is quick and easy, so I think it will prove quite popular. Here in the US, Sprint is offering an external camera attachment with some phones -- this will fail because 1) lugging a camera attachment around and then 2) plugging it into your phone before you take a snap shot is a Big Pain.