It's here.
16 lbs 10oz with cages, computer, pedals. That's with Ultegra, stock wheels. The Dura Ace 7850 wheels with the D.A. cluster I ordered should be here eventually (however long it takes to arrive from the UK), that will reduce the weight by another 200 grams, so with the D.A. clinchers this bike will weigh about 16 lbs. 3oz with Ultegra. With the Zipp tubuars this bike will be in the md 15's.
An upgrade to D.A. 7900 would shave another 250 grams or so, bringing the bike down into the 15.5 lb. range with clinchers.
Actually, this frame is not much lighter than the S2, which does sort of underscore my feeing that the S2 is actually lighter than advertised (I'm guessing the S2 is closer to 1000 grams than 1100). The bike felt great doing laps around Piermont Bicycle Connection (indoors on their carpet utilizing my mad Pcad bike handling skills). I'll drag it out for Nyack tomorrow for a test flight.