No joke! Some of you may have already gotten this via email, but here's the story, from the horse's mouth:
http://www.michaelmoore.com/words/message/index.php?messageDate=2004-10-06
Essentially, they want him brought up on charges in several counties for "contracting with another for something of value in exchange for agreeing to vote".
Apparently, on his present "Slacker Uprising" tour (which I think I missed here in Pittsburgh today), he offers gag gifts like clean underwear and ramen noodles to the "slackers" he is trying to convince to register.
Sigh....