Boxstoberfest will be held the first weekend in September of this year in Fredericksburg, Texas. I attended last year and it was great fun. If you want to learn more about it and register, check out this special web page the organizers set up for it:
http://www.ppbb.com/scgi-bin/boards/986/main.pl?read=1349223
Evidently, I won the award for "best spoiler phrase" last year...