I had trouble with reading the articles until I got to the straight-to-the-point one Marketing 2.0. Simply ideas, reinforcing that Web 2.0 is about 2-way communication (unlike a webpage that I might edit which is predominantly my ideas and without the provision for ease of comment).
Interesting how Web 2.0 is characterised not by software updates but rather by constant evolution.
Education 2.0 (which I skimmed through - so wordy late at night!) worries me slightly with potential students having possible issues with ensuring the validity of their educational institution. Online it can be from "anywhere". I welcome comments from those that read this article thoroughly to correct me on this point.