The iphone does have a connection point, and if I remember correctly, they are opening it up to third parties. So, if the phone can take blood pressure and insulin readings, I'm guessing it will only be a matter of time before it also accepts USB enabled devices. On a side note, I did see a pocket LED? projector (~$400) connected to this port on the iphone. It worked nicely.

It has a keyboard, pointing device, and display. Seems like a computer to me.