If you're a WoW player, you're one of two things. You're Alliance, or you're Horde. That's it. That's where the line is drawn. Or...it was. Pretty soon, that won't matter anymore. Blizzard have begun work on a new service that will let players switch sides. Alliance to Horde. Or Horde to Alliance. Whichever way you want to turn your coat, you'll b...