October 11 & 12. There's a little info. currently on the BA H3 Blog. Bottom line is that you can get a flight for about $300. You'll need accommodations, and the ferry across will cost another US $50 or so.
So far it looks like Dick So Soft, Sir Sump Pump, Bushy Pussy, and NoName Gonzalo are representing SCL H3, so you might want to coordinate with them if you have an interest.
Your faithful GM,