I was doing a rss feed reader in mirc script, but I got quite bored. If you want something like this and can find some other people I'll get around to assuaging public demand and finish it.
If you're bored with putting RSS into a script, try Atom instead. It has a similar feed syndication format as RSS but also includes an Atom API for writing content and posting it to a server, like MovableType or Blogger.