I work for the micro:bit Foundation, who have taken ownership of the project on from the BBC - great to see some love on HN for this! There's more at http://microbit.org but for the Hacker News audience you're probably interested in http://tech.microbit.org though ;). There's even a reference design to make your own microbit-derived designs.

We'll be hiring tech people again soon, so if you want to come and help us teach kids around the world to be inventors, keep your eye on https://micro-bit-educational-foundation.workable.com/

Finally, as the author hoped, the revision of the hardware now shipping is more resilient to ESD than the previous one :)