Looks like a new image was posted (20180801) which is nice.
Sadly it doesn’t boot. iot-sd and iot-flasher… uboot can’t finish booting.
The name of the dtb file in uEnv.txt in the /boot directory is wrong so when uboot trys to load it its unable to and then the boot hangs.
Once the proper path is set manually (via the tx/rx port using a uart adapter to get the uboot console) then booting proceeds correctly.
After that (in my case) the flasher script takes over and flashes the system (with the still incorrect uEnv.txt file).
You can then fix the dtb setting on the mmc and all future boots proceed correctly.
So it looks like the image is still sadly a little messed up.
LED lights though work properly though with this build. So that is a plus 
chris.