Warpstock 2013 will be held Friday, October 4th through Sunday, October 6th in Atlanta, GA. Details are still being worked out, but expect to see more details on the Warpstock website in the next few weeks. There will be one hour sessions on Saturday, and four hour workshops on Friday; if you would like to present at the annual conference, be sure to let the organizers know. Thanks to Neil Waldhauer for the info.
Source: OS/2 Warp News and Rumors