I'll re-do the /me hack once we get a final release of 3.5
We're probably going to get some bugfix updates in the near future so anything I do now will just be overwritten. Once we've got a stable release I'll add it.
Basically, valve host our DNS (until someone sorts out BIND on this box), and limelight host the actual server.
They did it as a favour when our last host screwed us around, and not to have any 'hold' over us - thats something they made clear before we moved onto this server.