I believe this t-shirt engine was actually released a few days before PleaseDressme. Teenormous, like PleaseDressMe, is also not really a search engine but a database of t-shirts manually selected by the site owners. They do have almost 15,000 shirts in that database though which is pretty impressive.
A search for Obama turned up 30 results which is much better than PleaseDressme’s 12 (3 when I originally checked). Also for t-shirt shop owners there is a way to submit a feed of your t-shirts to get included in the directory quickly but Cafepress owners, don’t get too excited, more than likely you can’t have your t-shirts listed there. They may make exceptions if you have your own domain and some great designs though.
I complained about PleaseDressMe’s site design but at least they had design. This site looks like it was just thrown together. It is functional though and that is the important thing.