I stumbled upon a network called 'BidVertiser' which I am now using on some of my content sites. The ads they're displaying seem relevant enough. The process of getting them on my sites was also quite simple. So far, it seems to be going well - I just need to wait and see how the earnings are. Hopefully they're better than AdBrite!
So my question for this thread is:
Have you ever used BidVertiser? If so, what was your experience?