One of the best iPod cases that I’ve seen lately is the iStik. This case effectively addresses the problem of sticking your iPod to your person whatever you are doing.
The iStik uses eight Neodymium magnets attached to a hard, clear Lexan plastic case. What this means is that you can just attach your iPod wherever you want in your clothing. Because of the strong magnets, it will stay firmly in place. Of course, the thinner the material the better the magnetic power.
I’ll most probably order this for my iPod.