We now offer such a similar service as InTrade but with Bitcoins:
Predictious. You can trade predictions on Sport, Economy, Entertainment, Politics, Business, Science. Like on InTrade, you don't need to wait for the market to settle to sell your shares, you can make a profit early. And like InTrade, the odds are fixed: you decide how much you want to buy each share for (from 0 to 10m
BTC), if your prediction is right, you then earn 10m
BTC per share.
You can find our
official bitcointalk tread. Don't hesitate to give us market suggestion or ask any question you may have.