Wanna make a buck from your blog? :

Get paid for blogging. Write about web sites, products, services, and companies and earn cash for providing your opinion and valuable feedback to advertisers. Disclosure required.

If you are an advertising agency, you might be interested in this model at Pay Per Post. I like the fact that the first thing a blogger must agree to, is full disclosure.

You must be prepared to disclose your relationship with PayPerPost advertisers and advise your readers of any sponsored content via a disclosure policy or on a per post basis.

This is GoogleAdSense taken to a creative level, and with more control. Plus the blogger can be as positive/negative as they like. Citizen reviewer and all that.