Each week Ross Rubin contributes Switched On, a column about the future of technology, multimedia, and digital entertainment:Last week's column discussed Slim Devices' elegant Squeezebox hardware, its versatile but complex server software, and SqueezeNetwork, the companion online service through which the hardware accesses the Pandora music recommendation service. Pandora is considered by some to be a "Web 2.0" site -- the blanket term we're all aware of referring to a startup that generates more RSS than revenue.But Pandora's recommendation engine is the best I've tried. Unlike many others, it doesn't rely directly on the purchase behavior or music ownership of other people, be they friends or fellow customers. R
