Russ Nelson interviewed at OSCON 2010
summary
Builds contrast between expensive buoy platforms and cheap sensors, describing half-million-dollar floating platforms with solar, winch and motor versus a $100 Arduino sensor node you can toss in the water and replace every few years. Explains using distributed rainfall sensors for hydropower watershed modeling, cites hobbyist hardware like RepRap Darwin and Mendel and the MakerBot, shows 3D-printed tactile logic diagrams for blind users, and demos a one-handed chorded Bluetooth keyboard for smartphone text entry.
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