There are a number of play money prediction market sites, as Tech Crunch points out. But BluBet.com seems like a very well done implementation. Are there better ones out there for general topics or a wide range of topics?
Relatedly, there’s a Facebook app called iPredict which is cool in that it’s integrated into your existing network, but lame in that there’s not a lot of thought about the interface or marketing and so the most common prediction is “I will get lucky this weekend”.
Prediction: BluBet will come out with a Facebook app to interface with their site.
Hat tips to Jon Gunn and Bill Hessert