If you were paying any remote attention you should have seen me, I thought I would ask if it was you Jeremy (Blue STi Northbound)
Unless it was Saturday, then no...it wasn't me. Tuesday..definately not. I did go up to Dahlonega on Saturday though with my wife and a couple of friends and we went Northbound on 400 that day. Just FYI - Mine's Blue with silver wheels and tinted windows.
It is possible it was me, but I dont think so unless it was the weekend, as I usualy go visit my rents in dunwoody.