You may already be aware of this, thought I would pass it on.
Google Launches New Ad Marketplace; Display Ads Will Never Be the Same
snip-
"speculation was rampant that Google would apply its unique and lucrative ad model to display ads after its $3.1 Billion DoubleClick acquisition. Now that speculation has become reality. Google has just launched the DoubleClick Ad Exchange, and it is just like AdWords and AdSense, except that it is a marketplace for display ads."
Google Launches New Ad Marketplace; Display Ads Will Never Be the Same
snip-
"speculation was rampant that Google would apply its unique and lucrative ad model to display ads after its $3.1 Billion DoubleClick acquisition. Now that speculation has become reality. Google has just launched the DoubleClick Ad Exchange, and it is just like AdWords and AdSense, except that it is a marketplace for display ads."