ED just hosted a webinar on the i3, led by OII head Jim Shelton. Though the basic information in the presentation tracked faithfully with the priorities document (so nothing terribly new or different), some of the Q&A was quite interesting.
I'm not sure if they will make the audio available, but there are docs on the ed.gov site. Also, I tweeted during the event--you can check those out at my twitter account,??@smarick.
Jim and his team have done their homework on this. Apart from the issue in my big complaint, this seems to be thoughtfully put together.