Hewlett-Packard has freshened its desktop and mobile workstations with new Intel six-core "Westmere-EP" Xeon 5600 . The move follows an early March update to the company's business notebook lineup that saw the addition of Intel's latest Core i3, i5, and i7 processors.By Intel's reckoning, the Westmere-EPs offer about 45 per cent more speed running workstation-class applications than the four-core Xeon 5500s they replaced in the Intel lineup last week. The Xeon 5600s and their single-socket desktop and mobile siblings - the Core i5s and i7s - will surely be coveted by technical users who always need a rocket sled, executives...