I’ve seen blog posts around about things you can do with RSS, but nothing themed around what people are actually individually using it for.
Here’s my list of how I employ RSS feeds:
-Keeping up with blogs
–Del.icio.us for bookmarks
–Furl for site snapshots
-Package tracking on Bloglines
-Tracking eBay searches for new auctions (though the site I used, rssauction.com, seems to be offline)
-Following discussion forum posts
-Automatic BitTorrent downloading
There might be more I’m forgetting.