Here's an interesting photo-book about tattoo typography — "Body Type: Intimate Messages Etched in Flesh," by Ina Saltz (09-2006). Found on Tim Cole's blog, and he's with the Adobe InDesign team. "This book makes me wonder if the lack of a series of Body Art templates is a glaring oversight on our part," says Tim. (Thanks, Caspar)
Reader comment: Jessica Reynolds says,
There is also a flickr group (of course) that chronicles "words on skin": Link
Darren says,
Inspired by Dominic Monaghan's bicep, I created a roundup a while back of textual tattoos: Link.