Everyone's excited about video as the new medium, but I think World 2.0 is much more about audio.

Audio plus a side-quest, like browsing the web together. Or playing a game. Or learning. Etc.

Imagine the entire web as a physical map, and as you move from cluster to cluster you start hearing friends that are in similar zones.

Hover over a link to NYT, hear the quiet murmur of other friends who are reading something similar. Visit the site and volume goes up.