Latest from the NTSB is now on youtube:
Some interesting info on the window - they have found no trace of window material inside the aircraft. He didn't conclude anything from this, but I would suspect it points away from window being shattered by high energy impact (ie. the blade) and towards the window or frame being cracked by blunt impact from other debris and then blown out. From the photos we have the frame looks to me to be pretty intact though.