If you'd like to get some geeky t-shirts that really make you stand out, take a look at this store. I think you'll like the t-shirts (and mugs). If you would like to have a cartoon that you'd want me to add, I'd be happy to do so as well.
You can either click on the picture above, or click on this link. One thing's for sure: You'll stand out in an audience—and especially at some ‘internet-based' conference.