Today, we're excited to announce an important update: Readability 1.5. Some of the changes are more subtle than others. We've been listening to your feedback and we're working to improve Readability for everyone.
via blog.arc90.com
Readability is a simple tool that makes reading on the Web more enjoyable by removing the clutter around what you're reading. It's a bookmarklet you click that formats a web page so it is much more enjoyable to read. If you haven't checked it out yet, you really should.