Just like in Beta 2, there is no WMDC in the image. In Beta 2 it came after a
couple of days via the Microsoft Update. Probably we'll get WMDC on the same
way next week. This is what I found on a MSDN-blog:
There's just one little problem. If you try Windows Update today, it will
not detect the WMDC download. This is because one additional step needs to be
performed to allow this detection to take place. Unfortunately that step is
restricted to internal Microsoft beta testers at this point. The friendly
Program Manager for WMDC, Lydia O, sits in the office next to mine. So I
asked her what was preventing external RC1 testers from using WMDC. She
explained that they're still working on some critical issues which make it
necessary to restrict public testing. Judging from the steady stream of
people walking in and out of her office all day, it looks like Lydia's team
is working as hard as possible to resolve those issues and release WMDC
publicly to Vista RC1 testers very soon