I use http://yubnub.org http://yubnub.org in the Firefox search bar for that. It has commands for nearly every search you could imagine. I'm a bit of a comman

I use http://yubnub.org http://yubnub.org in the Firefox search bar for that. It has commands for nearly every search you could imagine. I'm a bit of a command-line-geek, so that likely factors into its appeal for me.