PREDICTALOT IS THE LARGEST PREDICTION EXCHANGE CREATED BY NUMBER OF OUTCOMES (9.2 QUINTILLION). — [LINK]

http://predictalot.yahoo.com/

Predictalot on FaceBook.

David Pennock:

I believe it’s the largest prediction market created by number of outcomes (9.2 quintillion). We’re approximating a #P-hard problem to get the odds. More here. I believe v0.3 is faster and easier to use and with better social features.