It looks like the Republicans just lost their biggest ally in the 2008 election; hackable voting machines in Ohio and Florida.
Ohio's Democrat Secretary of State recently announced the results of a study finding that Ohio's voting machines were easily hackable and that hand-held devices could plant false vote counts and malignant software in them. (The Bush administration, with their utmost respect for the rule of law wouldn't hack a few voting machines to win an election now would they?)
Florida has already chosen to go back to optical scan paper ballots and Ohio is looking to do the same. Since these two states are the key to any presidential election, the Democrats might actually have a chance this time. There is strong circumstantial evidence that the Ohio vote, and therefore the election, was stolen by electronic means in 2004. It doesn't look like this will happen again:
http://www.nytimes.com/2007/12/15/us/15ohio.html