Slate is tapping into three “political prediction markets” to put together a ‘wisdom of crowds’ prediction for the 2008 election:

“If a single prediction market is wiser than the pundits and the polls, imagine how wise all the prediction markets are together. That’s the idea behind Slate’s “Political Futures,” which offers a comprehensive guide to all the big political prediction markets. From now until Election Day 2008, we’ll publish regular updates of the key data from Iowa Electronic Markets, Intrade.com, and Casualobserver.net.”