Is its server using minix3, by any chance ?
Service Temporarily Unavailable
The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.
Additionally, a 503 Service Temporarily Unavailable error was encountered while trying to use an ErrorDocument to handle the request.
Apache/2.0.54 (Unix) mod_ssl/2.0.54 OpenSSL/0.9.7a Globule/1.3.1 PHP/5.0.5 Server at www.minix3.org Port 80