What a pleasant surprise! I had heard that we MSDN subscribers would get a copy of the Longhorn and Whidbey distros from PDC, but the info suggested that it would be December before they were available.
I called in to place my order (per instructions at the PDC site) and they tell me it will probably arrive within two weeks! As if I need the distraction, but I am very excited.
I'm especially enthused to try out the Whidbey preview. That is where my heart truly lies.