Notaland.com is at the iSummit08 offering t-shirt remixes.
They print it on the spot, within a few hours. You get a template - this one had the iSummit08 logo on it, you tell it what Flickr stream you want (I asked for openDemocracy's) and you make your t-shirt.
Here is the one I did yesterday
Let me have your orders, Yen1,000 per shirt.Tony