I just discovered www.scroogle.org which is an ad-free Google search site that does not track your searches. Not only are there no paid placements or other ads, the results are Google results but in one long scroll instead of pages.

If you are looking for a way to use Google without Google tracking all your searches, this is the engine for you. If you want an ad-free search engine, this is it.

This engine can be added to the Firefox search engine list. Go to http://mycroft.mozdev.org/ and in the Search PlugIns, enter scroogle. You want the third option by Sean Cassidy (yeah, yeah), which is the English version, unless you speak French or Polish.