The ad auction module integrates the ad and the uc_auction modules to bring you advertisement slots that people bid for in order to display their advertisements.
Currently this module is in development and I am uploading it to the community for testing.
This is a unique way in which to create advertising revenue for your site. Advertisers manage their own advertising, cutting out the middleman and they can advertise at a cost which is based on supply and demand. As site admin your only job is to advertise to potential advertisers how they can get to advertise on your site.
The module works on the basis of a cycle of time for the display of adverts which can be configured through admin. Ad slots are re-auctioned in a regular cycle so that at the end of each display cycle the next batch of ads is ready to be displayed. If an ad slot is not bought then it displays your default ad.
This module should not be allowed anywhere near a production environment.