The reason I start the page with "what does it cost?" Is that amazon web services wanted to include blogfuel in their monthly newsletter, but insisted I clarify my revenue sharing model. The "what does it cost" was inserted to satisfy them and will drop out of the front page in due time. Thanks for pointing out my assumption that the users will know all the amazon features, I will link the listmania reference to the help file.
I have also had experience of using php output in an iframe see example here:
http://www.rawdistribution.co.uk/pages/decks.html
The iframe is in the middle of the topcrud section at the bottom, but just my luck, the feed from affiliate window is down at the moment so there is not much to look at right now.