Wikipedia are developing a human edited search engine called Wikia Search
Very interesting!
You can view a secret preview of the Search Engine by clicking here:
http://alpha.search.wikia.com/
Dont be too critical yet. It will take a while for them to get it right. From a design perspective - I like their use of fade in ajax when you click to add new results.
I would definitely contribute to it, but I think computer is best : )
