Love the Instapaper redesign. The folks at Betaworks did a great job laying out the rationale behind their decisions. This passage really stood out:
In all of this I was influenced by the great app and responsive web work I saw around me. Our stablemates Digg had their clean and trim Reader app out, MailChimp had just introduced their app-y redesign and Kippt had a nice, flat, two-column app. Looming largest of all in my mind was Rdio, whose thoughtful, context-appropriate consistency across web, desktop, and mobile apps has greatly influenced my ideas about how cross-device coherency can support a great experience.