RSS (really simple syndication) is a means of keeping track of the web logs that you read. It’s a push technology so you don’t have to keep checking for news, it comes to you. I use bloglines, a web-based aggregator, and my blog subscription is publicly accessible. There are many other services available, free and for a fee, some which use client software on your computer.
If you’re interested in the use and future of RSS, go to Stephen Downes’ discussion: "So, RSS could succeed. It will probably succeed. But it is important to keep our focus on what it does well: it allows an individual to scan, filter, and pass forward. That’s all it ever has to do. The network will do the rest."