If you’ve ever struggled to explain how the web has changed and where it is going to someone, point them at this video. In under 5 minutes it gives you a fantastic impression of what Web 2.0 really means.
The Machine is Us/ing Us
This looks like a really old post (I mean, it's from 2007 for goodness sake). Stay for the retro vibes but be aware any information in this post is likely way out of date.