Thanks to a tip from neofelis, I use Pluck as an RSS reader. One of the feeds that I watch is for a discount and coupon site called SlickDeals.net (http://www.slickdeals.net/).

For both of those reasons, the following article about RSS and shopping grabbed my attention. For e-tailers, it is really something to start seriously thinking about now. You do NOT have to be a big company to take advantage of the opportunities this presents.

Pluck Plugs XML for Shopping

http://www.internetnews.com/ec-news/article.php/3437421

Snippets:
On Tuesday, Pluck released Perch, an enhancement of its RSS reader that lets users save and manage feed searches, suggesting that it's just the thing for monitoring price changes on eBay and Amazon.com.

...a handful of companies are exploring the use of RSS feeds to connect shoppers with up-to-the-minute product and pricing information.