Hi everyone,
If you haven’t heard Google will increase their ad targeting powers on April 8th (they did buy DoubleClick after all). I am not here to bash Google’s decision, I use their site all the time. However here is link for a plug-in to block their surfing watching cookie (the process is cookie based). The plug-in works for either Firefox or IE and Opera I think. There are instructions for Safari and Chrome to manually make the changes (I didn’t check these out, I don’t use either).
It is from Google itself, you can take that for what ever it is worth.
Google Ad Opt-Out Plug-In