iceBar2 from Atlantic is an integrated iPod case and miniature speaker system for all three generations of the iPod nano. However, it's a nano case and speaker system with a nifty twist -- the whole kit and kaboodle is waterproof. The last time I reviewed a waterproof case I was impressed, but in real life I never used it once the review was done, mostly because the waterproof earphones I reviewed with it weren't very good.

iPod Speaker System Keeps Tunes Flowing in Wet Conditions