im using this http://www.agent18.com/productdetail/iphones/slim-clearshield-for-iphone/91.aspx for my ipod touch
I had an otterbox for my phone originally and it was like a tank. Then I realized I'm not a complete klutz and really don't need something that big. So I bought a few of these on ebay, different colors. I think it was 4 for $12 with free shipping. Everyone comments on my cover and it's much less bulky.
I've got the Rebel too. It's great except for that little rubber piece you're supposed to stick in the bottom of the phone. I'm sure I'll eventually lose it.