I use an InCase leather case for my iPod Photo. I always liked the original Apple belt clip cases they used to supply with iPods, but I didn't like that you couldn't use the iPod while it was in the case. This case is by far my favorite case I have had. I have tried an iPod sock, a nice silicon case, but this one has all the features I wanted. Good protection, can use the iPod while in the case, can attach an iTrip without removing the case, and has a really sturdy belt clip and i think it looks really good on an iPod.
Here are some pictures I took with my iSight.
Oh, and the best part is that i got it at TJ Maxx for $5.00.