I also attended and I was there from the minute the doors opened until they closed - so much to see and hear. My favorite room was one of the Scott Walker rooms that had all of the Synergistic Research equipment and the beautiful Magico speakers - the soundstage in the room was remarkable (though I wish they would play some more familiar tunes so I could understand if the resulting sound was a product of the system, or some crazy recording technique).
I also loved a small room upstairs - Room 354 had a tube amplifier setup from a small boutique company named Akustika Eterna and a beautiful tube DAC from Lampizator. The system was gorgeous and sounded great.
If I didn't have plans for today I would drive back up there and spend the whole day there again today!