Verisign's iDefense Labs has a program running that will pay you up to $10,000 if you submit a security vulnerability to them during this quarter that ends up being ranked as critical by Microsoft:

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.

Well, there you go - if you gots the skillz, go gets some cash.

And by the way - the iDefense Labs site is a great resource for IT and security types to keep any eye on. They provide content on the site as well as webcasts with well-done content.