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Google has begun informing web site owners that they are implementing “interest based ad targeting.” What does that mean? More data mining, but there is a way to opt out of this new practice.

Make the ads you see on the web more interesting
Many websites, such as news sites and blogs, partner with us to show ads on their sites. To see ads that are more related to your interests, edit the interest categories below, which are based on sites you have recently visited. Learn more
Your interests are associated with an advertising cookie that’s stored in your browser. If you don’t want us to store your interests, you can opt out below.

Just visit Google’s Ad Preferences to disable the targeting cookie, or if you are a FireFox or Internet Explore user you can download a plugin to keep yourself anonymous.

Also, if you want to block ads completely may I recommend Safari Ad Block for Safari or Adblock for Firefox.