Free online course on Gamification: https://www.coursera.org/course/gamification (University of Pennsylvania)
I think you can still sign up.
I'm always a little leery of online courses (I'm looking at you, University of Phoenix), but this is a quality program so far. The prof is an engaging lecturer and knows his stuff, and the stuff is very, very interesting and something that I think every modern marketer should know if they want to be successful in the coming decade. And in the first two Units, I've already learned some great stuff and have improved my ability to articulate the fascinating but often misunderstood concept of gamification.
If you want the certificate, you must get a 70% in the class. It lasts 6 weeks. There are weekly quizzes, some written work, some peer evaluated stuff and a final exam.
Source: MBA in Marketing; currently employed at a social media marketing agency doing strategy, planning, project managment & creative.