Microsoft announced at WinHEC 2006 that Windows Vista Beta 2 is available for MSDN and TechNet subscribers. The beta will be more broadly available through the Windows Vista Customer Preview Program in the next few weeks.
The timeline is still November 2006 for business and January 2007 for consumers.
You can find some more information about the release in this Fact Sheet.
We have a few days off here in Sweden, so I’ll have to play around with all the new betas and CTPs from Microsoft this weekend!