OIO Publisher is the best!
Here is a link to an article I wrote about it on BlogAboutYourBlog.com:
Monetize Your Blog With OIOPublisher | Cut Out The Middleman | Blog About Your Blog
Also, I wrote a post on my own blog about the best monetization WordPress plugins. That seems to be right down your alley
Here is the link to that:
Top WordPress Plugins | Monetize Your Blog With Ads | The Net Fool
Hope this helps you out,
-Jim