I'm about to launch a new site (big project) in the coming weeks, and part of the initial promotion push is to buy advertising from some ad networks, whether it be PPC/PPV or whatever. I have never done any ad buying really, so I don't really have extensive experience at this. So my question for people who have experience in this area, what networks would you recommend I try to buy traffic from? I have heard some good stuff about SiteScout, but I'm looking for more ideas. By the way this website is related to the job/employment field. Thanks!