The Washington Post has a decent article up about problems with eVoting systems.
As an IT guy, I KNOW that eVoting will be fraudulent. It can't be other than that.
That said check out the article and its comparison to Vegas Slot Machines!
I love it.
Best mechanized voting proposal I ever saw was the one that kept the system pretty much similar but, with Open Source software, the machine printed a "receipt" for your vote. You then "cast" that vote in the ballot box. Everyone got a quick tally from the machine and the ballot box was there for verification.
It wasn't internet, phone, or absentee balloting but it was fraud proof.