Web 3.0 is about money →
By this Montoya on Tumblr, I think. He has the Sonic 1 bonus level background on his tumblelog.
For the record, this is the official Web 3.0 definition according to yet another person on the internet with profit motives and no credibility (me):
Web 3.0 is a phrase to be applied to a plethora of conferences, books, and executive seminars, run by people from the internet with no credibility, for the primary purpose of taking money from people too hopeful or clueless to see through its hype.