Has anyone tried the threadless application offered on Facebook? It doesn't seem to have a lot of users, which I find kind of odd. There are two fairly large threadless groups on facebook, and there must be more threadless love out there.
I added it a while back and I like it. You can obtain street team points by having a product image on your profile. You can advertise your submissions, and you can show off your tee collection.
I use the collection feature. The t-shirts show up as little square tiles, pretty snazzy I have to say.