Sure, iRobot may have a strong presence in the impending robot apocolypse world of autonomous vacuum cleaners, but lest we forget about the others like Neato Robotics. The company's introducing the retro-futuristic XV-21 Pet and Allergy Vacuum for those of us wanting rid our domains of sniffle-inducing dust particles. Although the XV-21 looks similar to last year's XV-12, i
