I've never liked the term Web 2.0, but it's become established as the 'in term' for websites involving more than flat pages and information.
These days everyone wants to be seen to be doing Web 2.0 - even when they are not.
But what really IS Web 2.0?
What separates the sites that are really engaging in an interactive way with their audience? That are driven by participation rather than command and control?
And what does this mean for government (a user-participation activity!) and business in the future?
Professor Michael Wesch has some ideas in his video, The Machine is Us.