I just looked over at Engadget (a great source for tech news and stuff) and they said they have an source who has been testing out the iPhone for a couple days now. Apparently that touchscreen and keyboard is going to be a real pain in the ass. Take a look....
http://www.engadget.com/2007/06/23/new-details-about-the-iphone/
http://www.engadget.com/2007/06/23/new-details-about-the-iphone/