No need to repeat what others have said better:
Best of Web 2.0 Expo (Youngblood)
A presentation on “Massively Multiplayer Object Sharing”
ZDNet on “Web 2.0 Being Less Participatory than Assumed”
Web 2.0 Expo: All Things Widgets from Read/Write Web
Scoble on being on live web video “Always on Isn’t for me“