Just to add something maybe people missed. I was initially going to skip checking out Adbrite cause I am uncertain how they handle click fraud, etc.
But, did you know you can advertise on Facebook and AOL using Adbrite. And did you know you can target your campaign to the country, state and city level (state and city are US only). And did you know you can target males/females and age? And did you know they have retargeting at Adbrite?
If you are interested in paid traffic, the above is definitely worth testing out. And last point is that I have heard that some of the paid traffic whales use Adbrite to test their creatives. Then they take the most responsive ones and roll them out to larger million impression per day type of ad networks.
Anyhoo, I think it definitely deserves a second look.
JC.