End of August we made available a pre-RC1 - and just a few days later I am super pleased (Honest - I don't use that term often!) to report that RC1 is now complete and details will soon be available describing how to get access (TAP folks already can). Check out the official word from Jim Allchin 

You can also find .NET Framework 3.0 RC1 (and links to the SDK etc) for download on MSDN.

Just need to find a day to rebuild my main notebook to RC1...