Does anyone have experience with socialmedia? They have advertising on facebook apps, myspace, friendster... I experimented with them today, lots of potential traffic (230k impressions in less then 30 minutes while targeting u.s. myspace users and bidding very low), and much cheaper clicks overall then facebook. I had a text ad with a mediocre ctr getting plenty of impressions at a 20 cent bid. You can only really target the country and platform (facebook/myspace...) of the user, but I'll gladly take 20/30% less earnings a click for clicks 1/3 the price of facebook. Also it seems like socialmedia doesn't manually review the ads, the test ad I ran would never had been approved by the facebook nazi's, but it was on-air within 5 minutes of creation. Unfortunately their aren't any coupons floating around that I know of.
I haven't bought anything on Facebook since June but SocialMedia did not work well for me in the US at all.
RockYou worked much better; a few months back I was doing a good amount of volume at $.10 CPC and the users were a lot better than from Social Ads or SocialMedia and you don't have to worry about approvals. You can also try AdECN or DrivePM, they both have access to Facebook inventory but I don't think you can target to it on the AdECN side (you can with DrivePM).