MILITARY STYLE SPORTS ID. No, not for your bike silly, its id you might want to carry if you are riding and get hurt. How many of us travel with ID (actually, I keep a business card, credit card, $20 and proof of insurance in my backpack, but I'm a nerd :-)
Here's a $8 solution. Just get a set of dog tags so they know where to call.
I am hobby biker, this looks very interesting for me...
You might want to check out RoadID also: http://www.roadid.com/ I've been mulling over getting an ankle ID, but have been too cheap thus far. Guess once I get run over I'll change my mind!