From the Wikia Search about page:
Joking aside, I really hope this thing works well. The idea behind it is warm and fuzzy.
I was toying with the idea of using Amazon Web Services' (Alexa's) search results to build a similar Wiki style search engine. At very least I'd have started off with much better search results. Alexa doesn't give great search results, but at least they're usable.
I've put the idea on hold for now because I realized it's such a cliff hanger. Wikia will need a huge number of voting users to actually make a difference, but how are you going to get enough users to use a search engine that sucks? How many votes are they going to need to rank 12+ billion pages in the say 10 billion most common search phrases? Even if you can get a massive following of voting users, will they ever be able to compete with Google's years of algorithm development along with their search and "Google Analytics" data?
At the end of the day, for there to be another Google style (Search only, no existing web portal) rise to fame for another search engine, it's going to have to be as revolutionary as Google was back when it started. How is a search engine that states that "the quality of the search results is low" going to anything near revolutionary? Wikia can't be aiming for anything short of revolutionary search results. They need that critical mass. Will users really start a mass exodus from the big 3 just because Wikia search is warm and fuzzy? It's not like we're paying to use Google.