The site was showing a 500 server error - support at Voxtreme said the .htaccess file was showing the wrong information.
Odd - haven't touched it for a while.
Had a look myself and there was a file in the .htaccess with the title "Hacked..." and a claim of being done by a bunch of Muslim hackers.
Oddly enough, they seemed to have inserted a bunch of php errors showing that mambo files could not be reached.
Sad to see this place attacked so quickly - I guess that means we're popular.
I was running the front of site on Wordpress 1.5.2 but will have to upgrade to Wordpress 2.0, despite the less friendly interface.