A colleague's recent question about Web3.0 has sent me off to the web looking for a clear definition, and among 546,000 other results, I found this one, which I'll share here. It's a cleaver, clear, understandable introduction to the subject. I found it through The Next Web blog. The presentation is on SlideShare, where you can share it to various other sites, and download it. The presentation was created by a Dutch internet strategy adviser Freek Bijl, and has been translated from Dutch.