So far Eric Conrad has a blog post about it :Installing OpenWRT on a RouterBOARD 750GL
Photos of PCB (circa May 2014). Note that there appear to be testpoints for a serial port connection along with 3.3V power. In addition you can see the spot where USB could be, but the connector and power supply apear to de-populated. The back side was very uninteresting.
toh/mikrotik/rb750gl.txt · Last modified: 2014/05/04 00:08 by twrecks