I didn't do anything other than what was in the set up guide posted earlier in the thread. I may have just gotten lucky though. Arinoth is having issues with one of the AZs and Supa did at first as well. My AZ1 instances seem to have decided that slower is better...they seem to get the larger WUs. My AZ2 instances are at cruising speed...over 25 WUs completed from each of them.
Once this is over, you'll catch back up and pass me.