Windows Phone's Mango update was released to manufacturers for testing two weeks ago, and you know what that means -- it's time to speculate on what's lined up after the still-unreleased refresh. Mary Jo Foley's dishing out some juicy rumors from sources that the next version of Windows Phone is codenamed "Tango," and has a few tricks up its sleeves. The new OS would have a tighter focus on Nokia's desire to bring
