MN has paper ballots, so the likelihood of machine errors, chads, and such... is very low... This result will likely stand, but the GOP better have a plane full of lawyers on the way to MN just in case...
All the DemocRATs need to do is invalidate 726 Coleman votes. With paper ballots, you take a Coleman vote and put a mark through Franken as well. Since the ballot now shows TWO votes, it is thereby invalidated. Similar to how they used to take card ballots and force a rod through the "D" hole. Any "D" votes in the stack are untouched, but the "R" votes are rendered invalid, since they now have a "D" next to them.