>>As an alternative why not phone voting?
>
>It's a thought, but personally I would prefer a method that gave me an instant hardcopy receipt - not sure how you'd do that with phones, except by mailback, a process that's a little slow and uncertain.

I'm jumping in a little late on this thread, so maybe this idea has already been suggested. How hard would it be to make teller machines handle the voting process. Each voter gets a Card with a PIN number (as has already been suggested), the teller machines are already on some sort of network, and they can also give the voter a "receipt" of how they voted. I would think the cost of getting the software changes to allow these system to handle voting would be far less expensive then equipping all the polling places with new Voting Systems.