Mike A. has this great Nike+ Hack with his Adidas shoes:
“Having just bought the Nike+ Sport Kit and 4GB Silver Nano, I didn’t really want to drop another $100 or so on new shoes. Thus, I got out a Swiss Army knife and did some reconstructive surgery on my old Adidas running shoes.”
I thought of doing this with my Ryka shoes, but after a year of owning the Nike+, I finally acquiesced and bought a pair of Nike Zoom. I have to admit that the Nike+ reads a tad more accurately INSIDE the shoe than outside with a Shoe Wallet.