Curation comes up when search stops working.

When you got a cell phone you stopped making plans. 'I'll call you when I get there.'

[C]ollaborative production is simple: no one person can take credit for what gets created, and the project could not come into being without the participation of many.

What you need for a participatory system to work: "a plausible promise, an effective tool, and an acceptable bargain."

Curation comes up when search stops working.

Wikipedia is forcing people to accept the stone-cold bummer that knowledge is produced and constructed by argument rather than by divine inspiration.

Curiously, once technology gets boring, the social effects get interesting.