dkads has been a pretty good company, as far as we can tell. We are testing them out on some of our hostees, but everyone keeps seeing the same banners, and each day our CTR goes down down down :-(
the support is great, emails within the hour (usually), I just wish our gaming network could get some banners visitors would be interested in. It's a hard time for the ad networks, but DKads is doing a lot of good things. If they could maybe up their pay rate, and get some more advertisers, we'd really start putting them on more hostees and such.