Okay, given that we have pretty successful examples of wikipedia as a general crowdsourced information storage and stackoverflow as a specialized domain crowdso

Okay, given that we have pretty successful examples of wikipedia as a general crowdsourced information storage and stackoverflow as a specialized domain crowdsourced Q&A site, would it be impossible to build a crowdsourced search engine? Not even scraping the web, but I would just type my search term, if that is already searched and results voted, I would see those. If it wasa completely new search term, I would get no immediate results, but my search would be displayed in "new searches page", which some voluntary people would be following and trying to add relevant results.