Hi, I remember playing a year or so ago a game where you could bet on the outcome of various events, mostly political. You would buy contracts for prices between 0 and 1 "dollar", which would earn you one dollar if the bet proved true and zero if not. You could also create your own contracts.
I cannot seem to find it again - can anyone help?

Can't say I know it but have you looked at a site like theunderdogs?

http://www.the-underdogs.org/

Search in the "Simulation" or "Strategy" genres.