I would like to know how the heat sink is attached to the board - in some pictures it looks like typical black plastic push-pins with springs, but on the NB block it looks like actual screws may have been used - can you clarify this?
Also, (this may seem overly paranoid) how sure are you that the heat sink is made of copper? I only ask because the Abit IP35-Pro uses an all-aluminum heat sink that is painted to look like copper. I hope that ASUS wouldn't have done this with an enthusiast board, but it never hurts to be sure.
Thank you for noting the large number of fan headers, which I also appreciate; why spend $100+ on some fancy-ass BigNG or Aqua Computer bling when your motherboard can do the same job? Aside from the fan headers and impressive array of temperature and voltage readings, I'm also very interested in those OPT1 through OPT3 Temperature readings! It looks like users can attach up to three temperature sensors right to the board, (ambient, water/GPU, GPU/HDD, etc.) which would be great, especially if you can use OPT Q-fan and Power fan menu to configure fan speeds based on those temperatures. Can you elaborate a bit on those features?
Also, with the abundance of temperature and voltage readings available in the BIOS, I would think that a program (like Abit's uGuru) that displayed that information while in Windows would be extremely useful for monitoring temps/volts under load - does ASUS include any such program with the motherboard?