Wow, thats an amazing shirt, my life would be complete if I had one.
That's what you said about the linux t-shirt.. maybe you could get the commands written on the back?
I was being sarcastic and playing along with t'internet meme of the t-shirt (check Jasper's link
)
Better than the linux cheat sheet though are some of the stats/science orientated ones on the XKCD shop, primarily the correlation one, but also the SCIENCE one. Parents are off to the US this weekend, so going to get them delivered to their hotel to save on the postage (I'm such a scrooge!!!).