I know overstock.com has one; but they don't provide the movie year in their feed, which is annoying - anyone else? Last I checked Amazon didn't provide very useful feeds. Thanks!
If you've got a high traffic site and are open to adult materials, there's a private feed available upon request to select affiliates of http://www.wantedlist.com - the affiliate program is at http://www.spankbank.com and you can email bank at wantedlist.com after registering to get the feed.