And the 11th time? I think I've had significantly > 10 sites I use have major password leaks. And I just turned 26 - my 10 fingers (ok, 20 with toes) would need to last a lifetime for this to be a viable solution.
I'd be more concerned about government mandated fingerprinting. Using public key authentication, it would be possible to make biometric keys nigh impossible to steal (such that they don't ever exist on disk in any form whatsoever.) However, they're really easy to steal if you can ever get physical access to the person or any personal records that happens to record said information.
