Fairlay (https://www.fairlay.com/) which offers
a betting market where users can bet against each other with Bitcoin
is in beta mode for the next 2 weeks during which time you can sign up for an account with 50,000 free credits.
Bet as much as you can until March 2 and win as much as you can! The top 21 users with the most credits will share $500 worth of BTC
For more info and an interview with one of the co-founders: http://www.cryptocoinsnews.com/2014/02/15/interview-fairlay-prediction-market-replace-bitcoin-bookies/
One of the available bets is on NXT having a market cap of >90,000 BTC (originally 75,000!) by Feb 20.
Any takers?
