Just FYI - that link is about the 2003 Harvest. Diane Maney always puts this thing together at the last minute. I don't know how she does it.
We all usually find out about it with a flyer in the mail sometime in mid October. Sometimes there are still performers "To Be Announced" even later. Registration usually runs $85 or so.
Somehow it always comes together. As soon as anyone in the Atlanta magic area gets the flyer, the information is posted on www.gamagicclub.com.