I'm sad to see the doors close on Wikia Search. I was an intern in the NYC office last summer. The project had a refreshingly open philosophy and was built using FOSS components.
Yeah, I was a big fan of the idea. Clearly Google saw the potential, too.
I almost wish it wasn't a part of Google. I'd like to have two offerings that are totally different-- one that's 100% pagerank and one that trends towards user-ranked. Right now we're kind of losing out on the latter because Google isn't necessarily taking into account the user rankings across accounts.
There's an opportunity here for a hacker with low overhead to move into this market of an 'open search engine'. It doesn't necessarily have to be 'user powered' but should be much more open than Google/Yahoo/MSN's mighty algorithms.
I guess they're just busy trying to avoid beaching themselves and trying to hear themselves think with all that ultra-low frequency sonar bouncing around these days. I mean, we all get a little User Generated Content fatigue now and again. Now imagine how hard it is to type with those really big flippers.
At least the index is still available at http://index.isc.org/