Just find a good way to run Facebook Ads, haven't try it yet, but I would like to share it with you guys.

http://www.dipoll.com/blog/2010/11/s...ing-campaigns/

(Not affiliate link, just a normal article posted on a blog, not my blog)

This tactic may be not useful for IM products(forbiddened by FB ads), but I think it's a good way to build a huge list which you can promote CPA offers to.

Ian