RSS stands for Really Simple Syndication, and it's a great way to catch up on all your favorite websites at once, especially those that don't update that often.
I use newsblur.com, but there are many others, like Feedly, etc.
You can add a feed to a newsreader site (like newsblur) by copying the link on the little orange RSS icon that's now at the top of the blog.
Happy RSSing!
EDIT: The RSS feature now adds full HTML to each post in the feed, so it can be viewed in all its glory with RSS readers such as NewsBlur.
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