Have you ever wanted to create a RSS feed just for a perpendicular category in wordpress?
Say for example that you run an artiest website like my friend Camilla d’Errico. You want to send your users updates about upcoming shows but you don’t want to send them all the status updates and other blog posts. Well we can create a separate RSS feed just for the news posts. And if we where so inclined we could also create a mailing list (via feedburner) that our users could subscribe to just for the news.
Well your in luck because wordpress already does it for you. You just need to know the syntax
<blog url>/?feed=rss2&cat=<Catagory ID>
It works in Wordpress 2.6.3