Get your old Google back

Want the old Google back without the left sidebar nonsense? You just need a different URL: http://www.google.com/webhp?hl=all#hl=all&source=hp&q=. Every query string parameter appears to be necessary.

Install an OpenSearch plugin (Firefox, Chrome, possibly others)
The XML file

To make searches from the address bar do the same thing, go to about:config and change keyword.URL.