Dmoz – The Open Directory Project
dmoz.org
dmoz.org
With crowdsourcing, I think you get to a point where content coming in becomes normalized (see reddit), and people start migrating away from that community in search of more variety. I would also like to point out the boston bombings fiasco as an example that internet crowdsourcing (read as angry enabled mob) can be silly if not dangerous.
Have there been any studies on how a flat community behaves on the internet?
http://www.skrenta.com/2006/12/dmoz_had_9_lives_used_up_yet....
It is a book containing a bunch of links sorted by categories. Anyone can submit, it has to be approved by some people and then you are on it and maybe other search engines will use it. Although, I doubt anyone is using DMOZ nowadays. It is pretty old... I'm surprised it is still up.
If I had something interesting to say about that, I ran into their list of cryptographers:
* http://www.dmoz.org/Science/Math/Applications/Communication_...
* http://www.dmoz.org/Science/Math/Applications/Communication_...
I have no idea how they made it. It seems pretty random.
You do have a point about the having to be approved to be able to edit. It wasn't very hard to get approval though.