Hi ergotropic:
I am waiting "patiently" as most are on this thread that have not heard back yet. I happen to know a good number of folks who attended or currently attend Anderson, and there seems to be two schools of thought. Some say anything you do after you submit has little to no effect. Others say "it can't hurt, it can only help". The latter group is usually composed of folks that have had someone call on their behalf (usually a VIP, who is also an Anderson alumni), which ultimately led to an interview. I attended class this week, after submitting for R2. I figured since I'm close to campus I have no reason not to attend. However, even one of the Anderson students that took me to class said it has no effect in the decision process...
I hope that helps, even though it's a lot of info. The bottom line is that you can read these threads all day, and one thing rings true: the process of being admitted is nowhere near black and white. There are so many components to the puzzle, I doubt any one thing you would do at this point would dramatically affect adcom's decision-making process.