Just popping in to give you guys some links:
wired.com did a cool slideshow of geek tattoos. I submitted my d20 tattoo, so feel free to vote for it (or not) in the user submitted section. There are some pretty great tattoos by readers there, you should definitely check it out.
There is also a flickr group for geek tattoos. Again, some rad (and weird and bad) stuff in there.
Again feel free to email me if you have anything you want to share.