A year or two ago, I told people I was willing to bet that GW would leave office when he was legally required to do so. Oddly, considering the number of people who said they were worried about a coup, I didn't get much in the way of takers. There was one person who bet $5. I can't remember who it was, but it was definitely at a phillydruids or dvpn get-together. And someone else who bet me an ice cream sundae, but I'd have to go to her home in New England to collect.
I'm still willing to bet that he'll leave at the end of his term.