Not a new concept, but loads of new applications (Score 3, Interesting)

I've always been interested in ways of tapping into the crowd as a resource.

Slashdot and Digg got a lot of attention as news filters, but these things are now being used everywhere. Trusted Places for restaurant reviews, Crowdstorm for shopping recommendations, wine sites, health sites, etc., etc. I can't wait to see where this is all headed. What's the next logical step?