What does web 2.0 have to do with you and me? Web 2.0 is the phrase that is used to define the new internet. web 2.0 is Ajax, it’s user contributed content, it’s a different kind of interaction, a different kind of internet. Web 2.0 is people interacting with computers and each other, it’s flickr, it’s Meebo, it’s Digg.
Here is a great YouTube video about web 2.0.