Shoe Pouch for Nike+ iPod Sport Kit, and Nike+ SportBand (2-Pack), Also Fits Adidas miCoach Speed Cell and Garmin Foot Pod
Contrary to what I've read on this site, this is a quality product and works perfectly.  I did not want to be tied to having to use a Nike shoe with the Nike Plus.  This simple pouch allows me to use it without issue.  There is no issue with accuracy of the Nike Plus and this pouch.