A very nice article on RSS found at IBM's developerWorks:

Realize the power of RSS in Ajax and Web 2.0 applications - Tap this article's fully functional PHP code snippets that show you how to use PHP-based server-side functions to develop your own customizable RSS feed aggregator. [IBM developerWorks]

I'm still looking for an article that explains to those of the non-IT persuasion what RSS feeds are all about. Everytime I make an attempt to explain RSS feeds to those how don't even know what browser they are using...I get this "deer caught in the headlights" look from them. They then usually turn around shaking their head wondering if I will ever try to speak to them in English. Sigh...