Finally! Got the Tesla Vision message this morning with the Proceed to Delivery button. I have not formally been shown a VIN, but as for everyone else, it is available in the order page source code after I accepted Tesla Vision. 984XXX.
(side note: based on the VINs I have seen on cars built in late April and mid-may, Tesla builds about 5000 per week. We might see the 1 millionth Model 3 this quarter!)
My delivery window moved up to June 14-20. This seems consistent with the shipping time of ~10 days from Fremont to Ottawa. The end of the wait is near