GR has had a merchandise store for a bit now but I can't find it here on the site. Here is another link to some GR gear. http://www.cafepress.com/gamerevolution I want that beer stein 8)
No you don't look stupid. There's no link to it on the new GR site, so unless you've been around since at least the last incarnation of the website, you wouldn't know about it. I would assume there's no link to it on the GR website because most of the merchandise on the store is now outdated, bearing old GR logos and stuff.
They should put the Jack Thompson drawing on a T-shirt. And they should have a t-shirt contest to see who can create the best GR t-shirt, and the winner gets a free game!