A pair of mega-reader/mini-tablets undergo some changes. Amazon's Kindle Fire has only recently started shipping out to customers but already a flood of complaints have been rolling in on its touchscreen, one-click shopping and volume and parental controls. Meanwhile, the latest Nook Color update will essentially give users the capabilities of the Nook tablet -- for $50 less. And comedian Louis C.K. skips the middleman in selling his new concert special.