Unless you're absolutely brand new to affiliate marketing (and marketing concepts in general) the seminars aren't really worth it.
The only seminar that was slightly entertaining last time was the 'Future of SEO' session, not because I actually learned anything but because Jason Calcanis kept trying to essentially hijack the session but kept getting pwned by Will Reynolds from Think Seer.
NickyCakes said that if anyone needs a place to stay, he lives in Boston and you can stay at his place... but... you HAVE TO wear a NY Yankees tshirt or hat during your stay.
Thems the rules apparently.