Gary Burd’s weblog explains how to construct your own RSS feed of an amazon.com query. It’s really not hard, either — it’s all in the URL. Sorry, but I can’t remember where I found this link (I like to credit my sources when I can). It was probably one of the Lockergnome newsletters … errr … RSS feeds. Now, that I’m using bloglines.com and RSS, I rarely read newsletters anymore — no reason to!
And, from this entry in Dan Gillmor’s eJournal there’s this link to a page on Amazon.com discussing their syndicated content. It also gives a couple of good links to more information on RSS and readers.