Inbound Marketing University

I'm looking for a social netowrking specialist to help me with a new marketing campaign for a stock market site and maybe soon for an outsourcing site. Please do understand when I say Social netowrking expert I'm not referring to someone who knows how to add friend on Facebook or how to submit site to social bookmarking sites, that's really not impressive. I want someone who really know how to maximize social networking to generate tons of traffic. You clearly need to know how maximize Twitter Facebook, Myspace and Linkedin. I'm actually not looking for a one time project, if you have you have the skills I want it to be for long term and continue bring tons of traffic. It is hard for me to give you a specific project description considering that I leave it to you to make the proper plan, but I will ask to make a bid on a 20 hours' work per month.