Wikia

There was a lot of questions tonight about the Wikia open source search engine.

It's URL is: http://search.wikia.c...
It uses the nutch search engine.

From their about page:

Wikia's search engine concept is that of trusted user feedback from a community of users acting together in an open, transparent, public way. Of course, before we start, we have no user feedback data. So the results are pretty bad. But we expect them to improve rapidly in coming weeks, so please bookmark the site and return often.

There's some interesting insights as to what this means on several news outlets. (You can search for them on google) or start here