Quora goes (more) viral
techcrunch.com
techcrunch.com
http://www.guardian.co.uk/technology/2011/jan/05/quora-quest...
That column will be in the print edition today as well.
It has real identities like Facebook. The information density and structure of Wikipedia where each page updates in real-time. The follow model of Twitter where you can follow smart people and topics.
Here's a simple hash:
LinkedIn => Recruiters Facebook => People you don't want to be friends with; Twitter => People you wish were your friends; Quora => Basically Hacker News comments' like quality + twitter like asymmetrical following + domain experts whom you can contact directly! Also, there your upvotes are visible too :-)
Here's a thread on Quora similar to your question - http://www.quora.com/Is-Quora-a-glorified-forum?q=is+quora+a...
In contrast to Facebook, where the vast majority of information is mind-numbingly dull (maybe that's just my friends) it connects people based on interests and requests for expertise.
So far, it works.