Anonymous - why?
In addition to using a paper fill in the box and optically scan it method, I would like to see my vote tied to me. I have never understood this compulsion to have it be anonymous, other than to disallow the possibility of verification against individual voters to allow fraud.
I would like my vote recorded, and then be verifiable by myself online. The lookup key? Simply the sequential number of my place in line against the voter registration book I sign in against. Multiple books just start with different thousands (10001, 20001, etc).