Anyone tried the Nike+ ipod?

[SteelBlue]

Looks very cool. A transmitter in your shoe broadcasts to your nano. From what I've been told it will calculate and announce through your headphones your distance, speed etc... I've also been told that it will choose music for you that will inspire you to speed up or slow down based on the data you've entered (don't know if I believe that or not). Supposedly tracks your workout data and you can upload to computer to track training. It also looks like there are lots of folks selling velcro pouches to hold the Nike kit's sensor for those who don't want to buy the Nike+ with the built in pocket.