Absolutely, nothing is dead or impossible in IM. I still know some people who are making money from MySpace which pretty much proves the point. It would be a lot more easier to switch on to different methods as you can make a lot more if you put into something else which has got more potential.
So, if you're a lot of money and don't mind waiting few months to see the money flowing in, I don't think you will face any kind of problems. No matter what people say, its still the best and the most popular Social Networking site anyway.
To begin with, I would suggest you to check out the threads in this section. There are some cool tricks and tips which you must know to get a kick start. Check these:
http://www.blackhatworld.com/blackh...t-changed-their-email-settings-go-profit.html
http://www.blackhatworld.com/blackhat-seo/facebook/669206-free-tips-guru.html (Skip the trolls)
http://www.blackhatworld.com/blackh...2-zero-hero-facebook-milking-challange-6.html (OP Disappeared after a while but you can check the last few updates to see what he did wrong and learn from that)
And depending upon how much money you're willing to invest and what methods you have in mind, check out the tools and services being sold in the BHW Marketplace. Some of them are really cool and would help you a lot in scaling up your methods and raking in some good amount cash if you know what you're doing!