I am not too sure when Google added this but I just noticed it a few minutes ago. There are 3 new user features: "Promote", "Remove", and "Comment". These appear next to each listing in the search results. I assume this is based upon your Google account and it allows them to store the information based on what you prefer to see (Personal search setting so to say). However I tend to think they will also be using this to better judge the overall quality of a website based on surfer opinions.
So what do you think of this new feature? Will it have an effect on search engine placement, or is it simply an added feature to go along with our Google accounts for a more personal searching enviroment?
Example:

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