i have an ipod touch and a pomme vernis cles. i just tried it and it doesn't fit. john 5 is right -- you need to be careful w/ the screen, especially w/ the chain and zipper on the cles because i could see those scratching the beejeezus out of the screen and the back. i'm not sure if a mono or damier cles would be better since they have a bit more give, but honestly i wouldn't try it. too risky for your touch, IMHO. another TPF'er got a fab red epi iphone cover and i saw another mono one on here. it's for the iphone though so keep in mind the touch is thinner and you'll want to make sure it doesn't fly out. shove a chamois in there? maybe ask those folks what they think.
right now i keep mine touch in one of those cute ipod socks (a pink one, 'natch) and i shove an eyeglass chamois in the sock w/ it to clean off the screen. it's not terribly fancy, but it's worked the best out of anything so far!
good luck!