All right, all you cat owners, you can show your support for your favorite feline by getting a cat t-shirt!  There are all kinds available on the net, from cool to downright silly.  Here are some of the better collections:

Cat T-Shirts Recommended by Irielion -- THE place to start when
         shopping for a cat t-shirt!
Yuckles Cat T-Shirts -- some nice tees; I like the Maine Coon Cat
Cat Picture Gallery Tees -- a nice collection
Choice Shirts -- another good collection
Manx Cat T-Shirt -- very, very cool