A much-buzzed-about motion-sensing PC controller from startup Leap Motion has secured a distribution deal with Best Buy (BBY). The Leap Motion controller will be in all of Best Buy's U.S. big box stores (about 1,400 locations) by late this quarter, San Francisco-based Leap Motion announced Wednesday. The BestBuy.com website will begin taking U.S. preorders for the $70 device in February. The Leap Motion controller measures about 3-inches long,