This TED talk blew my mind on so many levels. The evolution of Captcha to Re-Captcha and how a simple piece of technology which by itself is beneficial to the world at large (by preventing automated submissions and thus of tremendous value to CRM driven and eCommerce sites) is also used to solve a bigger challenge and digitize books. A simple idea that helps reduce wasted motion and make the world a better place. Duolingo - The ambitious mass collaboration language translation project is a huge social win-win situation. I'm inspired by ideas and people like Luis von Ahn every day to use simple human insights and behaviors and fueling these with technology to create and manifest ideas that have the power to change the way we live.
Sources: Google is buying Lytro for about $40M
13 minutes ago