I wouldn't know how many people tweet, but its probably in the region of billions as opposed to millions...I am of course prepared to accept that not all of them live in a goldfish bowl, and I never actually said they did. We do have a family Facebook page which my own kids update mostly with photos etc...and they chat with friends on there, though I have no idea what possible use I would ever have for it personally...there's a lot of fads I can't comprehend, Kindle is another one, what use is a device that has the storage capacity for 10,000 books?...even if you sat at home all day and did almost nothing else most people could probably only read maybe 2 or 3 books a week, so book #9,752 on your Kindle is about 90-100 years off, books aren't like CDs where you dip in and out playing the odd track and can get through probably 10-15 per day. Ok most people wouldn't fill the thing to anywhere near capacity, but I worry about a world without books where everything that matters to people is stored on a microchip in your pocket, books have done more for the historic progress of western civilization than any other single factor, they are basically what separates us from all the other mammals, things like Kindle could usher in the end of publishing, and when there is no more publishing then chances are there's no more authors, and all that's left of us is one gigantic interlinked blog.