Google search gets social/interactive/addictive/wikish

So, if you have a Google Account (if you use any Google service where you have to login, you have one) and you are logged in when you search, you can now actually play around with search results that you receive on any topic. What do I mean by "play around"? Take a look at these extra icons next to the results:

Now I can remove results that are irrelevant to my search parameters and promote search results above how Google ranks them. Essentially every search becomes an editable wiki for registered users. This makes Google searches exciting again (for now), better than other search engines (until they copy it), and perhaps might even result in more relevant, human-reviewed search results (until it starts to be exploited and becomes irrelevant/useless). But remember that Google makes its revenue from advertising, so if more people search their site and are exposed to ads they can potentially click, Google gets a first-mover advantage (just in time for the end of FY2008 Q4).