I’ve been very happy with my Amazon RSS Feed Generator. It has alerted me to quite a few new books coming out on topics that I’m interested in. The only frustrating thing is that many of them are not yet in print, so I have to wait!
Now I just discovered a site that does something similar for eBay searches. The eBay2RSS feed generator will generate a feed from a simple eBay search, but it also allows you to go into eBay, generate a URL for a complex search, and use that to generate your feed. So if your looking for a bargain on something special, this is the way to go!
Although I should add that the Amazon RSS Feed Generator will also work with Amazon zShops if you are a serious bargain hunter. [