Mozilla Firefox users are lucky to have this functionality integrated in their address bar, which enables them to visit the first site of Google for a keyword when the user does not put in a valid website address.
Now, UserJS.org brings to you similar functionality by using a UserJS script which is so cool! The script has been developed by Nicolas Mendoza and requires at least Opera 8.0 to work. The site describes this UserJS as:
If the page cannot be found, this script forwards the content of the address bar to the I’m Feeling Lucky ™ search feature from Google. This behavior can be changed to use any other service.