Take a look at the following post from a forum
Frankly, I am not sure. I hope it may become reality not just a rumor.
Does anyone suppose that since and iPhone 3GS is out or coming out, anytime soon, a iPod touch 3GS would come out? or is the ipod touch just gonna stay and just new firmware (2.0) with the app store and all. iPod touch 3GS , it is a rumor or not? Why can i find some websites selling the iPod touch 3G cases? like kaboodle, alibaba, uxsight etc. but I am not sure that, you can have a look at the store: http://www.uxsight.com/product/17552/antislip-silicone-skin-case-for-ipod-touch-8gb-16gb-red.html