ArXiv and PLoS are growing as the way scientists share knowledge.
Digital Cameras: They recommend Casio EX-Z600 ($279), Canon Powershot SD600 ($350) and more. All have 6MP and great specs, including min 800ISO sensitivity.
Hospital-grade air filters can clean your air for about $500.
See John Maeda's book The Laws of Simplicity for UI and design hints.
Lessig's column tells about new opensource-inspired business models. See revver.com (for videos, with ads inserted automatically), Openbusiness.cc, Eric von Hippel's book Democratizing Innovation.
Netflix has a production company Red Envelope that secures distribution rights for overlooked DVDs, and turns them into money through its recommendation engine finding viewers.