I'm still struggling with this one. If you know of a reliable way to project or use an external monitor from Windows Vista Beta 2 with Aero Glass then please hit the comment button.
I realise that most of you probably haven't had time / access to the software yet to get any where near being able to try this for yourselves.
When I do find out - whether from within MSFT or elsewhere I'll be sure to share it.
The nearest I get @ the moment is to boot the machine with the external display attached - this often works but not always. Otherwise I can roll back my video driver to non-WDDM though that looses the Aero Glass effect. Finally I can often extend my desktop to the other monitor.
Of course another option is to Remote Desktop into the Windows Vista machine though then of course you don't get Aero Glass either.