I think most of this, from acorn to voting irregularities, amounts to a non issue. When you're counting 90 million discrete events, there's going to be some swirl. The way we learn about the swirl is through the media and they're all concentrated in the battleground states LOOKING for anything vaguely irregular and then amplifying it. The news is always looking for the strongest visual/angle, so you go to a place where it's possible 2 votes being mis-counted could change the election.

The military guys votes should obviously be counted, but it won't IMHO matter, Obama will win in a walkover today.

If I were king of elections, it'd be 100% paper ballots (take your pick absentee or polling places). #2 pencils for everyone. I choose the Canada method... See the last few paragraphs here: http://www.pbs.org/cringely/pulpit/2003/pulpit_20031211_000795.html
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The charm of fishing is that it is the pursuit of what is elusive but attainable, a perpetual series of occasions for hope. -John Buchan