I work as an ad agent for a UK publishing house, and we have a partnership with PerfSpot. Good company growing quickly.. They are only about two years old and we have worked with them for the last 9 month.. I believe they are mostly international.
actually see a lot of imemm ads on Perfspot.. looks like it is the opposite.. perfspot is a lot like myspace, but has a few features that are better including some offline events.. myspace will always be the king, but it is nice to have options..