This free Xippee browser plugin works on all of your favorite search engines (Google, Yahoo, MSN), with versions for IE, Firefox, Safari, and Opera. Xippee 60 second Demo: http://www.xippee.com/XippeeDemo/XippeeDemo.html
WinXP,Windows2003,Windows Vista Home Basic,Windows Vista Home Premium,Windows Vista Enterprise,Windows Vista Ultimate,Linux,Mac OS X,Mac OS X 10.4,Mac OS X 10.5