I find it difficult enough to keep up with Web 2.0 let alone consider the possiblity of Web 3.0. Here is an definition of what web3 will be about and to me it seems very logical. GoogleWave certainly seems to be attempting to meet the concept of a one stop site that enables communication and storage. Will we become our web ID, time for some speculative fiction on this subject please.
Web 3.0 Concepts Explained in Plain English
Digital Inspiration sums up the differences between Web 1.0, Web 2.0, and Web 3.0 and provides six related presentations which discuss Web 3.0 in detail. See the diagram here
the above is from itlibrarian
I also would like to use the staff wiki this week to communicate with my colleagues about how the library is using web 2.0 including our twitter account to promote reading and information.