I'd hate to live in a world without Instapaper. It has changed my reading life, and my productivity. More than merely bookmarking an article, I put it on my reading list that shows up on all my devices. And the new version is so darn pretty. Bonus tip for nerds: check out Marco's podcast on 5 by 5: http://5by5.tv/buildanalyze.
Updated: Oct 27, 2011