Crowdsourcing is the answer, IMO. If there's one thing Google has, it's a lot of users. Whatever happened to SearchWiki (http://googleblog.blogspot.com/2008/11/searchwiki-make-search-your-own.html)? It had a pleasant user interface, well-integrated with the results. I feel that such a mechanism, with a reputation system of some sort (perhaps subscribing to weighting results as edited by trusted groups of users) could drastically improve search result quality.