I actually saw that recently on ThinkGeek and thought, "Hey, that's pretty darn cool - could be fun." I can see it being really useful for some people. Then I also thought, "How often do I listen to the radio outside the car? Would a $70 gadget - even a cool one - make me listen any more often?" and so I didn't pick one up. It is a really slick product, from the looks of it.