If you're going to get a geeky tattoo, here's a good idea.... a nifty math equation. If you're not a math / science geek he has some other ideas as well:

I've got plenty of ideas for other tattoos -- the "Jono" kanji, the "Aikido" kanji, the Enso logo, maybe some Python code... my body shall be a medium for expressing my ideas.

Personally I'm wondering if I should get DeCSS in perl tattooed on my butt?