I'm a big fan of Web 3.0. Kent thinks it's silly. 
That's the point. Web 3.0 is a silly remark on Web 2.0. At the event I was at today, you could choose some "tags" - little stickers that you apply to yourself to describe what you do. There were tag stickers for Web 1.0, 2.0 and 3.0. 
I picked out "semantic", "RSS" and "developer". They're pretty good tags I think. They did have a "penguin" tag. 
