I did get a call from TE about the Solar Roof as I had requested info on it fairly early after the announcement since we are building a new home here in the Bay Area. The timeframe sounded like early 2019, but that was beyond my window so declined further involvement.
We're doing a new build in MN that we'd planned to do Tesla Shingles on. We are at the top of the reservation list but I'm guessing it won't come in time. Our builder said they can go about 2 months with just paper on the roof before they have to roof it.