I’m trying to come up with a list of all the things you can do with onsite RSS.  If you have any additions, let me know (robyn@sleepyblogger.com) and I’ll post them.

Real Time News
Syndicated Topical Briefs
Keyword Searches
Flickr/Digg/Etc. on site
Affiliate Feeds
OPML Aggregation (Newsletter)
Weather Forecasts
TV Listings
RSS Mashup Feed