TechBytes: Amazon Pricing DisputePresident Obama on YouTube, Facebook Doppelganger Week, iPad Grammy appearance.By BRETT LEVY and CARRIE HALPERINFebruary 1, 2010, 9:52 AM ET• 1 min readPresident Obama Answers Questions on YouTubeFacebook Doppelganger WeekiPad Grammy AppearanceMore From TechBytes: Facebook Privacy Changes T-Mobile Users Lose Data Microsoft to Offer Free Versions of New Office Program Watch TV on the Go Verizon Gets the Google Phone