I certainly can't do it now, having a GeForce 6800 I get the black-box problem with FF8.
I am actually not sure about running FF8 with FSAA with current cards, but I remember reading numerous success stories some time ago, when people were using Voodoo3/GeForce2 era cards. I believe the most recent card I had that I tried and worked was a GeForce4, but I really haven't messed with FF8 much lately.