yes, would be nice for replacement variables in different languages. i am using something like that which works only for logged in users, not for guests:
Code:
if ($_SERVER['HTTP_HOST'] == "en.domain.com") {
$_REQUEST['langid'] = 3;
$_REQUEST['styleid'] = 4;
} elseif ($_SERVER['HTTP_HOST'] == "de.domain.com") {
$_REQUEST['langid'] = 2;
$_REQUEST['styleid'] = 3;
} else {
$_REQUEST['langid'] = 16;
$_REQUEST['styleid'] = 5;
}