I am constantly amazed at the cynicism from Slashdot about electronic voting. Yes, the existing systems have generally sucked. A lot. But that doesn't mean it's impossible to do.
The fundamental problem which must be addressed is verifiability. In order for the election to be secure, you must have a process which guarantees that tampering will be detected with high probability, **even if a malicious company designs a large portion of the voting machines**. This is not an impossible problem!
For example, suppose you want to be sure your vote is not being flipped. A system which meets that criteria is for the voting process to go as normal, then the machine encrypts and publishes the vote (accessible from the internet), which you verify. Then you are prompted to either check or commit the vote. If you 'check' the vote the machine publishes the encryption keys for the vote, and if you 'commit' then the machine publishes a commitment. All of these actions can be verified by you.
Now, that system isn't perfect (it can compromise the 'secret' part of the ballot). But there are verifiable systems which meet all the criteria for an election. They are not less secure than paper ballots, they are *more* secure. Don't trust the machine, trust the verifiable actions the machine must perform.