nomis5 - 6:17 pm on Oct 10, 2011 (gmt 0)
In one of my website areas Vibrant does extremely well. But they seem to be very dependant on the subject of the site. Kontera didn't work for us, probably for the same reason.
But one definite no is AdBrite, assuming they are still in business. I've tried them twice and the results are truly depressing.