It occurs September 13-14 at the Georgia International Convention Center near the airport. The cost is $199 for both days, though I believe that my free pass for September 13 only came from an ISC2 announcement.
Preceding the conference on September 10-13 are professional certification prep courses for the:
CEH CNDE CSA CHFIC CISO
White Hat security organizations are sponsoring the event, such as: ISACA, Infragard and ISSA.