I have to say i really, really like CBProAds, check out my example sites:
Free Diet Programs: A Review | Best Diets Web - Weight Loss and Nutrition <-- article page
Best Diets Web - Weight Loss and Nutrition <-- main
Why i like them?
They are far better then other services scripts and allow a VAST variety of ads to be created, including adsense contextual style ads, image ads, scrolling ads. Keyword specific or you can specify a clickbank niche.
It even displays Book/Product shots if you want, it also supports banners.
Clickbank descriptions are "rewritten", its not the "affiliate focused" descriptions like "Now 75% commission, highest payouts!" as they come off CB marketplace....but consumer-oriented ad texts.
You can even make a whole storefront of clickbank products if you want, this opens up other possibilites. (Might be comparable to amazon astore)
You can sign up free, then a certain percentage of ads get their ID embedded, but i signed up for 6months "pro" service and its only $29.95 for 6 months. I love it, cant wait to make more niche sites.
I was also told by Steve W. that textads convert better, so, depending on niche i decide either just displaying text ads....or maybe add a couple banners, if i like.
The old way to advertise for me was MANUALLY to go to vendors, check out their affiliates sites, copy banners, make links etc.. they seem to have all the banners on file...so this also saves me lots of work.
Check them out, A+++ alternative to AdSense..