uuummm... I can not really post a link. If you are an Apple staff member, distributor or, as we call them in Australia, Solutions Reseller (just someone who owns an Apple retail store) you can sign up for Apple's Learn and Earn.
Learn and Earn is just a site where they give you courses and you have to do exams on what you have learned. You gain points for the exams and, apart from being ranked, you also can win prizes.
If you are registered with Learn and Earn and score more than 80% on the .Mac course, Apple will give you one free year of .Mac.
What I thought was a bit dodgy, though, was that if you had already paid for .Mac before they released this promotion you can not get a refund or extension... you just suck ****.