I just went through it for one website. What a tremendous time waster as it is set-up now. You have to wade through page after page of advertisers - many of whom are in the wrong categories - just to find a few you want to use. They need to implement a search function. I used it on
www.canadaemployment.info in the top 468x60 position. A few advertisers have image ads to use, but most are run of the mill google adsense style.
It would have been nice to just type in the few keywords I wanted to target and be presented a choice of advertisers, but it sadly doesn't work that way. And if it does, they don't make it very apparent!
There seems to be a few large companies already using the service, but many are clickbank types as well... blah no thanks.
Would love to hear from anyone else already using this!