Just how big is the internet? Well, here's a way of estimating it: Every hour, enough information is consumed by internet traffic to fill 7 million DVDs. And four years from now, it'll be four times larger than that.
Read more >> http://techland.time.com/2011/06/01/how-big-is-the-internet-spoiler-not-as-big-as-itll-be-in-2015/