Law.com has an article dated Monday on the beauty of RSS feeds: "Stay Informed: It's Really Rather Simple."
Personally, I use Bloglines to quickly keep track of the blogs and other feeds that I follow. The Law.com article says that the Ohio Supreme Court has a case activity notification service that uses RSS. The Eleventh Circuit also has an RSS feed for new opinions, which I subscribe to via Bloglines. Note to the fine people at the California courts website: Please publish an RSS feed for new published appellate opinions!