In one of those slightly bizarre coincidences, we wrote a MindBullet seven years ago, suggesting that in the future (still to come) you would have a small earbud that could read your brainwaves and send out a tweet, just by thinking about it. We've seen lots of research and some progress towards brain-computer interfaces, but the idea of simply thinking to type has not quite arrived yet. Perhaps the people at Facebook subscribe to MindBullets, as they are working on this idea!