For a while, it seemed like the 850 / 1900MHz 3G version of the Nexus S that'd work on AT&T, Bell, Telus, and Rogers would be the next one to show up, but Sprint ended up emerging as the frontrunner more recently -- and now it's official. The Nexus S 4G stays true to the T-Mobile-flavored original, offering an unfettered stock Gingerbread experience; it's fractions of a millimeter thicker and a couple grams heavier, but the real change is inside where you'll find b