Hundreds of free, open-source fonts optimized for the web

Google have a script based service that allows you to define s set of fonts for use on your website.
What's so special about this ... ?
Well this service prevents you having to depend on the fonts installed on the target PC!
This site uses exactly this service to set up a font called "Cupral".

To set up your custom font visit the Google service here (http://www.google.com/webfonts#HomePlace:home).
Then paste the script provided into the header of your site;
ie.

<link href='http://fonts.googleapis.com/css?family=Cuprum' rel='stylesheet' type='text/css'>
<style media="screen" type="text/css" >
            body {
                      font: normal normal 15px Cuprum;
                      }
</style>

Just like that!.