Windows Vista Fast User Switching on domain joined machines

Bink has the following:

Looking over at John Howard's blog today (not the Aussie Prime Minister, the other one!) I noticed John is excited at the discovery that Fast User Switching appears to be enabled in the Vista Beta whilst joined to a domain. For those who don't realise, currently XP only supports this feature in a workgroup environment, not in a domain. IF this feature makes it through to the final release of Vista then it will be quite a change.