Wow that is a great looking website. What joomla component lets you do that?? CJ and joomla is a poerful combo. PM me the details I am interested
For the people wanting a wordpress script check out the first tool mentioned in this thread. Popshops.com has a WP version: http://www.popshops.com/faq/wordpress
I am debugging a script that works just like this with the cj api program. I also have it set to include ebaypartnernetwork feeds too. PM me if you would like to try the script out. You can view a preview of it at www.rockbottommusicgear.com. I added the pages using a datafeed from another affiliate company and inserting the data into the fields in the database, however, there is an easy to use admin section that allows you to upload a picture, type the meta keywords and description and enter your content. There is also a field for the keywords you wish to search CJ and Ebay(if you turn this on in the global settings field).
Really not that difficult to do it yourself. Click on my sig link to Bid Point Art which is a WordPress site. Add some adsense and RSSinclude feeds from eBay and you have an instant affiliate site.