ADSDAQ (www.adsdaq.com) is an interesting advertising program that can be used in conjunction with your other advertising programs.

Key Features

• You specify the minimum CPM (cost per thousand)
• You provide alternate ads to be run when ADSDAQ cannot meet your specified minimum CPM. This allows you to set a minimum price for the ADSDAQ network.

I am in the process of trying this program on some sites. I'll report progress here soon.