A press release from Chicon 7:
Chicon 7, the 70th World Science Fiction Convention (Worldcon), will be offering a special membership rate discount for all Adult Attending membership purchases made on Memorial Day, May 28.
For 24 hours only, Adult Attending membership rates will be lowered by $20, to $195. Anyone joining or upgrading their membership online will automatically receive this special discount. The offer will also be available to fans buying Chicon 7 memberships at conventions held over the weekend—look out for Chicon 7 representatives at Baycon, Wiscon, and ConQuest.
Chicon 7 remains on track to be the largest and most spectacular Worldcon since 2006, when the event was held in Los Angeles. Well over 3,000 people have already registered, and some 5,000 are expected to attend the five-day event, which will take place at the Hyatt Regency Hotel in downtown Chicago from August 30-September 3, 2012.