FYI, for anyone wanting 'anonymous' google, checkout Startpage.com. It uses google search results, but acts as a proxy so that google can't link the search to you. There is also an "anonymous view" link next to every result, which allows you to also use the startpage proxy when going to the result's webpage.
The downside (at least for me) is that 'instant answers' don't seem to work as well as with normal google. E.g. if I search for conversions like "USD to CAD" or "lbs to kgs" google will have the direct conversion results at the top of the results, whereas startpage will only have links to conversion sites. Also, in some cases, google's ability to provide the best search results* is at least in part tied to them using your location/profile in their search algorithm, so the results may not be as good when using the startpage proxy.
*And I do find that Google consistently provides the best results. I've tried switching to other search engines like duckduckgo (yahoo), but unfortunately I found they just weren't as good at finding what I was looking for.