iDefense labs, a subsidiary of Verisign, have announced a quarterly hacking challenge, and each quarter they will offer a different security challenge. Here are the details from their site: "For the current quarter, iDefense Labs will pay $10,000 for each vulnerability submission that results in the publication of a Microsoft Security Bulletin with a severity rating of critical. In order to qualify, the submission must be sent during the current quarter and be received by midnight EST on March 31, 2006. The $10,000 prizes will be paid out following the publication of the Microsoft Security Bulletin and will be paid in addition to any amount paid for the vulnerability when it is initially accepted. Only the initial submission for a given vulnerability will qualify for the reward." If you think you've got what it takes, go for it!