Aaaaarrrhhhhhh! 3 full weeks now since I RMA'd the swapped but faulty board to Overclockers who returned it to ASUS and still no replacement or word on what's happening.
They sent me a faulty board so I expect to receive a working one within a few days of return at most.
This is ridiculously bad service from ASUS.
Edit:
Just had this from Overclockers,
"The reason why it has taken longer to RMA this board is because as it was originally swapped out with Asus under the sandybridge swap to the B3 revision we have been struggling to send it back to any of our suppliers as the serial numbers do not match up at all.
We are still awaiting an outcome from our supplier at the moment."
What a pain!