I've had an MB burn up two RasPi's. Same symptoms - way too hot with way too much voltage into the Pi. I'm betting it's the square chip slightly above the mini-USB connector - RG2 - that's doing the heating up. That's the chip that got so hot on mine - so hot it heats up everything around it. Two fried PIs...
Ah yes I remember you mentioned something about this in the past. What did you end up doing? I emailed Dave to see what he can do about the board and RPi