A very good demonstration that SharePoint Portal Server is not an Enterprise 2.0 solution, and that you must avoir using it if you want your users build new real social practices for productivity, reactivity, innovation and competitiveness.
These companies, say the authors, are showing that the use of blogs, wikis, widgets and other Web 2.0 tools "encourages horizontal collaboration and harnesses the power of collective intelligence to boost productivity, foster innovation and create enhanced value".
Full interview of Mark Zuckerberg at Web 2.0 Summit. He starts explaining how FaceBook is trying to redefine email process launching their own email platform.