kitzilla writes "Hybrid/Organic LED lighting. Hyper-efficient solar cells. Practical wave power. So far, 2007 has been a barnburner year for environmental technology. Here's an interesting list of some of more practical, market-bound examples. Looks like companies realize "green" is also the color of money."
Quantum Mechanics is a lovely introduction to Hilbert Spaces!
-- Overheard at last year's Archimedeans' Garden Party