That looks very cool. It says preorders are open to “developers”, but the preorder button goes to an empty preorder store. Has anyone been able to preorder?
I registered for the pre-order and was accepted into the developer batch. AFAIK we're all waiting on the devices. Kernel development is actively occurring on the Quartz64 board (same CPU), and some people with pre-release devices are working on the display driver.
https://www.pine64.org/pinenote/