Userscripts.org

nice script
I suggest to add

http://binsearch.info/index.php?q=&m=&max=100&a...=
http://images.google.com/
http://www.tokyotosho.com/

I added tokyotosho myself by adding:

var ttimg = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQAQMAAAAlPW0iAAAABlBMVEUAAAD///+l2Z/dAAAAF0lEQVR42mNggIE/9TDkyPCnHBXBpeoBcPgS2r7xJnsAAAAASUVORK5CYII=";

and

searches.push(["TokyoTosho", "http://tokyotosho.com/search.php?terms=", ttimg, false]);