The Squidoo Beta is up and running - probably has been for yonks - but I just saw it today. It's pretty cool. Unfiltered, it seems to be like well moderated zones in which a "lensmaster" throws light on a particular topic.
This could have a pretty neat application inside large enterprises that are interested in non-heirachical communications. Where, say, an evangelist can drive a dialogue and throw light on a topic.
Here are couple of my fave lenses:
