Lot's of proposals have been submitted on the bitcoin forums for some sort of cryptocurrency solution/proof of work online voting, where there is full transparency by looking at the block chain to see how many votes somebody had, and prevention of a malicious actor forging votes. Of course you have to trust whoever is mining the coins and handing them out, and trust end users sytems aren't compromised.

I would expect in my country anyways that any online voting would be DDOS'd by idiots looking for a soap box the media will pay attention to and create a huge debacle resulting in them scrapping it and forcing a regular ol' paper vote.