Since I'm the last person on earth to upgrade to Tiger, I figured I'd play around with some of the new features and make something cool for you guys.  It turns out that there are a few nice hackability enhancements to the OS, including a nice little gui-based programming tool, Quartz Composer, which allows you to create interactive visual applications. 

The interesting thing is that OS X has direct support for using Quartz files as screensavers.  If you're a Tiger user, you may have seen the slick RSS Visualizer screensaver that's included.  This is written in Quartz, and it's exactly the sort of cool stuff you can build too.

The downside of the built-in RSS screensaver is that it only supports a single feed.  If you're a blog or news junkie, this is where you scream "boo!"  If you're also a hacker, you follow that with "fine then, I'll roll my own."

So here's my own RSS screensaver, called Site Feedz, which can be configured to pull up to 4 feeds, and allows you to jump straight to the article by pressing the 'r' key.  Cool, yes?