I can't use it, because I don't have a video card that comes close to being good enough. However, this new client claims to support Vista. Given the nonexistent x86-64 support in the GPU client, I wasn't expecting Vista support for a long time, either, so this is a good sign. Of course, it remains to be seen if the client can be run together with the Aero interface - probably not, but I'd love to be surprised again.