Google introduces Chrome extension to block search spam
Called Personal Blocklist, the extension allows Google Chrome users to blacklist certain domains when results appear in Google Search. Click the icon in the browser actions area to see which domains you've blocked, unblock a site, or edit its particulars.
At least one other Chrome extension which provides this functionality has been listed in the Gallery for some time, but the difference here is that blocks will be reported to Google. Google, in turn, will look at user data and possibly use that information to improve its search quality.
Install Personal Blocklist for Google Chrome, and start helping fight search spam!