Exciting - I just built up the latest PCB for the Pi HAT, check it out:

It's got a few changes from the previous version:

- Uses the low profile through-hole header sockets so it sits lower for a more streamlined enclosure

- It has an RGB LED on board for status indications, driven from the GPIO pins of course

- All of the surface mount components are on the underside now to make manufacturing a bit easier

Now I just need to modify the mechanical design for the new dimensions and I'll be able to do a full build to put up here next week.