Coolest definition of Web 2.0

Everyone has seen internet going into a new age.Right from HTML to RSS(XML) to Blogging to Video Sharing to Collabaration.Just happen to come across Jeremy Fain's Blog where he has mentioned about the coolest definition of Web 2.0

Basically, in plain words "Web 2.0 is just about sharing and collabarating information"

One of the coolest videos which demonstrates Web 2.0 is uploaded by Michael Wesch
Do not miss the coolest videos demonstrating Web 2.0 below....I am sure you would say wow after watching it :-)