After a long wait, there is now a shipping schedule for the Linux-based Librem 5 from Purism! Although this is probably not what most supporters wanted when they were told “delivery in Q3 of 2019” (after being delayed twice already), it is a start. Read about it here.
The phone will run on PureOS, a Purism-managed distro that they have been working hard to modify for a touchscreen/phone interface, both building on earlier Linux phone attempts, and starting initiatives of their own. They have a goal of upstreaming everything they do as well.
The hardware is the real kicker – all firmware is open-source. Gael has expressed an interest in running /e/ on it.