These guys will break the news every time there is a new release of WinFX.
Tim's posts - WinFX Runtime Components (February CTP) Now Live, WPF Major Breaking Changes in Feb CTP
Karsten's posts - Feb CTP of WinFX published - Breaking Changes
Check in here - http://msdn.microsoft.com/windowsvista/getthebeta/default.aspx - to find out more I expect the Windows Vista (February CTP) to be available to TechNet/MSDN Subscribers and beta testers very soon.
I'm looking forward to trying the speech recognition, p2p and search indexing in the Feb build of Vista as these were frustration points for me in the previous build.
Tags: WinFX Runtime Components Feb CTP, Windows Vista Feb CTP
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