f you're into the whole gym scene, then I suggest the DLO Action Jacket. It has a clip and is padded in case you drop it. I have used DLO Action Jackets for years for my ipod and I just received my touch action jacket yesterday and it is great. But if you're looking for something slimmer, try Griffin or Belkin.
When is the TuffWrap going to be available? And is it better than the Invisibleshield? The invisibleshield looks like a total pain in the @ss to install but it doesn't add any bulk to the iPod. I can't decide.
i think i finally decided on a TuffWrap from Xtreme Mac
http://www.xtrememac.com/cases/touch/tuffwrap_plus/index.php
it has everything i'm looking for. Unless Iskin beats them to the punch