More: YouTube, The Keyword, MacRumors, Android Authority, Philip Elmer‑DeWitt, iPhone in Canada Blog, iMore, Wccftech, and Redmond Pie Tweets: @chriswelch, @starfire2258, @jaypeters, @_gbalaji, @glynmoody, and @campuscodi Lauren Feiner / CNBC: Twitter's stock closes at $45.08, dropp...