Paul, I will bet 1000 HN karma at even odds on the following prediction: Chrome OS will not be killed or merge with Android in the next year. (if it was in the next two years, I would give 80% odds on the existence of a Google operating system not called Android that was the successor of Android+Chrome)
How exactly would you "settle up"?
or something not very likely like myself founding a Y Combinator company making prediction markets using HN karma. It would take a lot to convince pg to allow for direct HN karma transfers. It doesn't mean we can't create a shadow market with words.
I created a similar fake prediction market on Less Wrong.
http://lesswrong.com/lw/1tr/creating_a_less_wrong_prediction...