Google jumps on the social networking bandwagon and has introduced SearchWiki. When a user is signed into their Google Account and does a search in Google they will see new tools next to each search result. These tools allow users to move / delete / add / comment on search results. Although the comments can be made public (only to others who are signed into their Google Account) the positions they change are only visible to them.
Although Google has publicly said SearchWiki will have NO affect currently on normal organic search results, the future could. Google is always looking to make their search results better and knowing if 10,000 users don’t want to see a Wikipedia result #1 for every search result may be great information.