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In the Netherlands they got rid of voting machines all together in 2008.

A group set out to ensure that the election process in the Netherlands would become as fraud resistant as it was before the advent of paperless voting computers. They demonstrated that the voting machines could be hacked. It wass also a risk because of the small group involved in getting the results out of these computers, with no real possibility to check if they are real (because the source code is not open). Committing fraud would only have to involve a few people.

On May 16, 2008 the Dutch government decided that elections in the Netherlands will be held using paper ballots and red pencil only. A proposal to develop a new generation of voting computers was rejected.

More info at http://wijvertrouwenstemcomputersniet.nl/English