The Ipod nano's go for US$150-250
The integration kit costs US$29
The nike sneakers are US$99

I have seen pictures of folks cutting a hole in old sneakers for the chip or using various methods of attaching it the lasses and getting good results.

I am up to 11 runs and 75 miles on this combo. The web site and the voice prompts are a very good motivator.
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Cheers, -Doug Morrison Mk2-32G Back light buttons, Neon red screen