Google is currently experimenting with a digg like feature where user can push or vote a search result to tell which search result they like and more appropriate to what users have searched for.
According to Google Experimental Labs:
“Google is always experimenting with new features aimed at improving the search experience. This experiment lets you influence your search experience by adding, moving, and removing search results. When you search for the same keywords again, you’ll continue to see those changes. If you later want to revert your changes, you can undo any modifications you’ve made. Note that this is an experimental feature and may be available for only a few weeks.”
Have a look at it while you still can at http://www.google.com/experimental/a840e102.html