The logs are now down for quite some time. It looks like Netham put a "Deny all" in the vhost file for netham45.org (which problably has omnom.omnimaga.org as server alias). Well, at least that is what I think.
Anyone with server access to Omnimaga should be able to change this, as IIRC it's the same server. I assume the vhost file will be in /etc/apache2/sites-enabled.