Google has released a feature, SearchWiki, that allows users to tailor their search results to their own personal needs.

Once results from a particular search are in, Google will let users move them around so that their favourite sites end up on top, while the ones that are no use to them are erased.
The next time a user does the same search, the system will remember which sites they preferred and list them on top, while not even displaying the discards.
The move points to an interesting trend: that users frequently search for the same things – and want to get similar results.
Using the new system, users will see button below each search result, allowing them to move that site up or delete it completely.
Google currently handles about 60% of Internet searches.