blogvertise is clunky, but they are well supported. I wrote a lengthy and detailed email outlining what I felt could be improved, and they responded quickly outlining their plans. I think blogvertise and ppp are the major players. At this point, I think they need to start buying up some of the smaller ones to build their networks.
The only problem, I think, is that most of the bloggers that work for one, already work for the other.
It agree! Still they on payments are late. To me should pay 8.09.09, and have paid 11.09.09 (I any more do not speak about terms, 30 days it is too much!).