From @dan June 2017 Announcement:
Glowforge shipments underway, schedule update, and more (June '17):
We’re now shipping production units. We’re incredibly proud of how they turned out. Some of you have yours already. Some of you will get yours ahead of our latest schedule - and, I’m so frustrated to say, some of you will receive yours up to three months later. Our updated schedule for final, production units is:
Now: Glowforge Basic deliveries underway.
June 30: Glowforge Pro shipments start.
September 30: Air Filter shipments start.
October 31: All Basic and Pro orders placed by 10/26/2015 shipped.
November 30: All Basic and Pro orders shipped.
December 29: All Air Filters shipped.