BlackBerry (BBRY -6.9%) plummets as the WSJ reports AT&T (NYSE:T) "doesn't appear to be highlighting" the Z10 on its launch day, or "giving it prominent shelf space at its stores." The paper observes "fewer than 20 people" arrived at two Manhattan AT&T stores to see the Z10, and that a San Francisco store chose to display it "at a back corner of the store, away from a large sign advertising the iPhone 5." (earlier)