Done.
The only problem (and it's not working until we can find a way to fix this) it that io's httpd doesn't want to send xml...
Code:
<?php
header('Content-Type: text/xml');
echo "<?xml version='1.0' ?>\n\n";
echo "<text/>";
?>
This shows as text/xml when loaded in Apache2, but it's text/plain when loaded by io's httpd...
This seems to cause problems with rss readers, making them choke on the otherwise valid rss xml...