Status update:

It works! fatalsaint had the honor of being first to boot it, since I don't have a microsd card with me (I'm away from home...)

...but it is very raw. Screen brightness is very low, no way to turn it up, wifi isn't functional, no way to access a terminal, no way to shut the device off, and a lot of unfinished bits of software.

Basically, it's what you'd expect from a developer release.