I am confirmed as a program participant for L.A.con IV, the 64th World Science Fiction Convention. I don't know yet what I'll be doing on the program, but I will be at the con in Anaheim all five days, from August 23rd to 27th. I hope you will be too. (A lot of people don't like L.A. much, but I love it, as only someone who moved far away as a young child can.)
As a program participant, I get complimentary memberships for me and my wife. But since I had purchased one before getting added to program, I now have one Worldcon membership for sale. It can be yours for $175, which is exactly what I paid for it.
UPDATE: The membership is tentatively spoken for. If this changes, I will post about it again.