I am getting the exact same thing from my site, AND the exact same "its working" response from x10. I would say they internally have the dns correct, but somehow have the externall DNS messed up.
Internal people can use a tool such as http://browsershots.org/to see what we are seeing outside...
When I attempt to get to my domain it says "Domain Available! - Register Now!". I have logged into my control panel and it says things are in good standing. I also checked the suspension report in the control panel. I even clicked the link to my page from there to be certain my bookmark was not...