We do have semi-official t-shirts. They're semi-official because I printed them up myself, but I did run the design by Paul first. Paul liked the idea of using a magazine cover, but I couldn't find a cheap place that could reproduce them well in color.No amount of posting can get you one. There are only a few left, and when they're gone, they're gone. Someone else will have to take the initiative to make up the next accessory.One way to get one is to come drinking with the Random Walkers in New York. The other way is to attend a presentation I give, I usually give out two or three to the best questions. However, I've stopped doing that in New York, both because New Yorkers have more opportunities to get the shirts at bars and because I like the idea of distributing the shirts all over the world (three continents, anyway).