The Fly on the Mac has announced gambling on Mac rumors. Wagers placed on rumors that come true are awarded, and losses are pulled from a user account of ten grand. Real-time odds and early betting bonuses are available just like your downtown bookie. According to The Fly on the Mac:
The Fly on the Mac has introduced an innovative game system that allows registered users to wager on rumors. Users start out with an account of $10,000 from which they can bet on which rumors will become reality. The system is free to register and use, however, no real money will be awarded.
Rumors are available in a variety of categories and for different events. The betting system includes real-time odds and bonuses for early betting.
You can find more information about the betting game at The Fly on the Mac Web site. Game registration is free.