I've been using the Firefox browser at home for a little while now, and I checked out some of the extensions you can get for the browser. One of the ones I've tried is called StumbleUpon, and it's pretty addictive. It suggests Web sites that you might like based on categories that you select when you sign up. Yea, you have to sign up, but it's free and a pretty cool service, I think.
Firefox has a set up where you install a toolbar in your browser and then you can just click the Stumble button and you be redirected to a random site that has been rated as one you'll like by other people (ie, tagged).