If I keep this up, I might actually get the reputation of picking on Amazon.com as a hobby [just take a look at Is Amazon Missing the RSS Advertising Opportunity?, Why is Everyone Missing the RSS Transactional Messaging Opportunity? and Get the Most from RSS Marketing ... Take Your DM Hat Off!].

It's just one of those things. You see a company that could really go above and beyond with RSS and really use it to drive revenues, but they just don't do it.

But at least they're showing some activitiy lately ...
[in addition to removing their list of relatively useless category feeds, which used to be available here]

a) Gold Box
Gold Box is a service that provides you with personalized deals every day. It finally has an RSS feed with your daily deals.

But, unfortunatelly, the RSS feed only provides brief information about the product, instead of also giving you a direct purchase link, some of the latest product reviews and other information that could facilitate the sale. Also, there's no personalization, or so it seems. Why not give me an RSS feed with just the special deals for me, based on my previous purchases?

b) Plog
This is one of the genius Amazon ideas. Each Plog is personalized to the individual user, giving him the latest blog posts from Amazon's authors (just from the authors' whos books you've purchased), and it also comes with a targeted RSS feed, matching the Plog content you see when you're logged-in. You can also subscribe to additional blog content manually.

Also, Amazon is promising that we'll be soon able to track latest releases, changes to our orders and "much more" through our plogs, which will presumably also come be published in our targeted RSS feeds.

Amazon, please keep this up. Make us happy:)

c) The Amazon API
But let's be fair to Amazon. Even though their end-user RSS feed offering is poor, they do provide developers with the ability to create their own RSS feeds from Amazon, by integrating with their API.

Here are some examples:

RSStalker.com - provides a variety of Amazon product tracking options via RSS, such as a 10% price drop feed that lets you know when a product that RSStalker is tracking via Amazon drops 10% in price; RSS feeds from your wishlists; last 25 price changes in a selected Amazon category, and more.

Baebo - provides a persistant search RSS feed for Amazon products, based on your keywords.

More great examples floating around ...