I knocked together an ASP page that generates an RSS feed for bluebones.net. It validates via the RSS Feed Validator. Its not the kind of thing you can reuse off-the-bat because its got SQL specific to my site in and so on (its not an elegant reusable OO solution – this is ASP for crissakes) but I’ve made the source available because you could easily use it as pseudocode for your own implementation in whatever language.
I never really saw the point of RSS when the only blog-like site I read regularly was slashdot but now I like to read a bit of scripting.com, boingboing, metafilter and others its all started to make sense to me as an idea.