Wow!
I must have really kissed ass at ASUS becuase they were more than helpful with an RMA on my CUSL2. They were, without a doubt, the best company I have had to work an RMA with.
Some of you may have seen some previous posts I made about how I tried to install and ArctiCooler and I ended up taking out 3 traces right underneath the notch on the socket since I couldn't get it to work properly. I called ASUS on September 18, a real nice girl named Kristy gave me an RMA number and I sent the motherboard in. My new one just arrived today (via UPS next-day-air). They did a straight replace, no questions asked, even though I blatenly screwed up the board on my own. Two weeks for a complete RMA is awesome, in my opinion.
The number, as Midnight Rambler stated, is 510-739-3777; press 5 for the RMA department. Having to call CA from NY or anywhere else isn't that big of a deal since there's tons of long distance companies with those nickel-a-minute plans. True, the wait on hold can be long, but that's why I call from the office and not home.
Also, you should not use email to contact a company when you have important business (such as an RMA), as email is an informal means of communication and will rarely receive an immediate response from any bureaucratic system, and even if you do, it's probably not from the person whom you should be in contact with.
-CamaroGuy