Yet Another iPod Harness: iGrab

iCan't iMagine how much farther this iNaming thing can go. The
iGrab is
Rivet's new leather holster for everybody's favorite device. The stainless steel pin in the back of the harness allows you to quickly change your iPod context, from belt loop to car dashboard,
etc. The harness will be available via Rivet's online store next week.

True confessions: I don't own a single iPod harness. I make use of the ancient, timeworn cradling technology known as my pocket. And for those sporty, on-the-go occasions, I break out the trusty 'Knapsack Compartment' harness. You may want to check your knapsack to see if they've included a free iPod travel compartment, as well. You will recognize it by its tell-tale sign: the zipper.

Does anyone have a compelling reason for me why any one of these things would make the 'must-have' category? Which one do you use, and why?