The sad thing about that last quote is that it will probably resonate more with most people than any other - better - description of what blogs are/can be, because most people today live in e-mail. (Those that are connected, anyway.) I've had many experiences trying to implement collaboration systems in which the main question was, "Why not just use e-mail?" In fact, I still get that question when I ask co-workers why they aren't using IM.

We've come a long way, but still have a way to go.