Like any other host already has since a few weeks. Yay!

AFAIK Dreamhost is the first major provider to make it an easy control panel switch for their shared hosting customers, but I might be uninformed.

There have been guides and even plugins for hosting panels long before the official launch, i even saw some before the beta launch.

The hosting providers i work with, had it pretty much ready at launch time: Cyon.ch, Novatrend.ch, Gandi ...