Here is a short tip on how to remove "www." from your sites (and make sure others do not use it too). You will need mod_php (apache) enabled and PHP.
In the default virtual host base directory, make sure you have enabled mod_rewrite (check your Override directives if the following does not work), and add something like this in .htaccess:
RewriteEngine On
RewriteCond %{HTTP_HOST} ^www.
RewriteRule ^(.*) go.php
Then put in the same directory go.php:
< ?
$g = str_replace('www.','',$_SERVER['HTTP_HOST']) ;
header("Location: http://$g". $_SERVER["REQUEST_URI"]) ;
?>
