Not really new: http://www.sitebits.com/2000/SIG/ (Score 1)

This kind of technology is not really new. Similar approach was tried before for credit card applications, but the problem was that nobody really needed it. Check this link, look at what this technology was finally put at.

http://www.sitebits.com/2000/SIG/

I personally think that such technology can be used for fun and internet amusements, not for real signatures.