$80 is a little strong for my budget at a keypad of the iPhone. But others feel less comfortable with the onscreen keyboard can go in the MiniKey.
If there was a reason I've heard more than any other about why anyone would buy an Android phone or Blackberry over the iPhone, is that the person does not like typing on touch screens. Regardless of my argument that after a few weeks, I ended up writing a lot faster on the iPhone screen on my old Blackberry, people often opt for a physical keyboard.