Found this over SprintUsers.com I think, and wondering if anyone actually got these gel skins on the TOUCH.
http://mygelskin.com/
Click on Sprint - HTC Touch on the left menu.
I went to a local store in the bay area and looked at some of these gel skin and they will slightly add some thickness to your phone if you have them on. What I like about these is that it's not scratchable, and also it's can be stickied on the dashboard of your car.
If you have one of these, please give reviews here.