I feel vaguely like a sell-out using my blog to pimp an off-topic commercial website, but I'm sure that will pass in time.
While we wait, if you check out http://www.torsopants.com/ you'll be treated to a wide range of hilarious shirts that I intend to be wearing in the near future.
You're not allowed to buy any. After that whole xkcd malarkey I'm pretty much over showing up places and finding I'm wearing the same shirt as someone else. So look, but don't touch.