I've read allot of good things about BurstMedia here and decided to give them a go. Here is a mini review: The application was probably the longest one I have filled out for an ad network. The terms are strict... they require that their banners are displayed before any other banners on your sites. Any ads that you place must give priority to BurstMedia (meaning you can not use them as a backup/fill network). With these strict terms, I expected some premium advertisers. I ran the ad code for 24 hours and averaged a 51% fill rate with a CPM of $0.04. I have the traffic to make that low CPM work, but dropped them after seeing allot of those annoying shaking alert box ads. I try to not annoy my returning users into installing adblock plus. BurstMedia wants premium ad placements/priorities but does not seem to want to provide the same for their publishers. I believe that most would do better with a less exclusive network like adbrite.
if you are looking for a replacement for that, where sign up is pain-less and takes 2mins, and CPM's are always $0.10 or above. It never dips below that.
i believe that it is just the start. most premium networks will give you high CPMs after weeks. maybe 2 weeks. They still need to check your traffic to know which ads pays good on your site. ^_^