Sites:
http://www.amazon.com
http://www.dealextreme.com
This is a video on a couple of places where you can pick up some very nice deals on various iTouch and iPhone cases, as well as various accessories such as headphones and screen protectors. Generally the stuff you will find on Amazon is name brand stuff at nice discounts, and on DealExtreme you will find much cheaper, lower quality stuff. Don’t let that necessarily deter you, though. For only a few dollars you can snag some decent stuff, so if you’re willing to take a risk you might be surprised.
And the knockoff iTouch is awesome. You know it.