Tonight, Google changed its interface. Google Blog

The changes are called SearchWiki, and are a dramatic departure from Google’s streamlined, algorithm-rules approach to search. It takes features from Digg to allow users to vote site results up or down, as well as features from Wikia Search to allow users to add comments, move search results, add search results, etc. The result are customized results that appear every time you do that search in the future (assuming you are logged in).

Here’s a demo video:

Source: TechCrunch