I have a different take on what Web 3.0 will be. Some think its an edited version of wisdom of crowds (the basis of web 2.0), and that's already happening especially at the company I work for Mahalo. If you look at some of the projects that Make Magazine has been doing, as well Fitbit which was just launched at TC50 this week you might be starting to think - as I do - that the web interacting with real world and the real world interacting with the web may very well be the next big frountier!
Any other examples of hardware meets web? please comment and let me know :)