Finally we get to distribute this to all Vista RC1 (and higher) users. WMDC Beta 3 is now available here.
Incidentally, Vista RC2 (5744) is also available to all TAP, beta testers, Connect and MSDN. You can download it here.
(funny thing, it states RC2 here : http://download.windowsvista.com/preview/rc2/en/download.htm but RC1 5744 at http://connect.microsoft.com )