Four short links: 21 Apr 2009

Space arrays, mobile hell, book scanners, and open source brains: Great Brazilian Sat-Hack Crackdown (Wired) -- Satellite hackers in Brazil are bouncing ham signals off a disused US military satellite array. Truck drivers love the birds because they provide better range and sound than ham radios. Rogue loggers in the Amazon use the satellites to transmit coded warnings when authorities... http://ping.fm/Fg6Bv