I think that Hoss~ is on target again. It is just a question of developing a reliable and affordable implementation IMO.

If you look at the way that access control systems are going, it seems to be an inevitable development? It would certainly reduce the vulnerability to remote attacks, unless you can find a way to crack the whole system, rather than an individual's identity and password?

It certainly takes it beyond the realms of skiddies?.............. I am actually messing with some handwriting recognition software right now