I will be attending MCG in the fall. I know from experience how it can feel like a never-ending road (this is my second year applying to MCG). See if they can give you any idea as to where you stand on the alt list. If you haven't already, see what you can be doing now to improve your application. I would e-mail Dr. Hanes or Ms. Perry every week. Also, let them know what you are doing now. The more they hear from you the more they will see how bad you really want it. But, I am sure like you said, you have exhausted every avenue possible. Just stick with it - you will get there in the end. It is not uncommon for them to take people off the alt list in August.