The week in video: Web 2.0 economy, Marc Andreessen; Yahoo; Live Mesh

Here's a look at Web 2.0 Expo's greatest hits.Is the Web 2.

Here's a look at Web 2.0 Expo's greatest hits.

Is the Web 2.0 economy in limbo?

Marc Andreessen talks past and present

Yahoo CTO talks up Open Strategy

Microsoft takes wraps off Live Mesh