I've just refreshed the page and my reply doesn't seem to be there, strange.
Anyway, as a biker, I have came across these
http://www.digitaldogtag.co.uk/
I don't have one of them myself, but they work in a similar way that they hold all info.
I use some of them 'engrave yourself' kits from bargain madness I think, got all mum,dad,home phone numbers on along with my address and things like stating I have no allergies. Thought I'd do this as I broke 2 vertebrae in 2007 and thought after the extreme pain, along with trying to answer questions, it was very difficult. So in the unlikely event of something again, I'd have those!
Bet my other reply displays after this now! I refreshed page quite a few times to see if it was put on, then went to diff parts of the forum and back and still wasnt there!