There you go, now we're alright. We've just released the Windows Mobile Device Center for x86 and x64 today (officially, although the download files were published on the servers yesterday). Go ahead to the official WMDC site to download the updates.

By this evening, the WMDC option will appear in Windows Update if you cradle your device and manually start Windows Update on your Vista machine.

I know a few friends who are dying for this update. Told ya it wouldn't take them long. :)