Dice Holdings, the unimaginatively named owner of technology jobs site Dice.com has purchased Geeknet's media business for a cool $20 million. The deal hands over control of the world-famous Slashdot, Freecode and SourceForge to the careers company, commencing the careers site's push into tech content. It leaves Geeknet with one remaining property, ThinkGeek, which will now be getting all of that company's attention -- hopefully to produce products that are even