Seattle hotels are booked heavily in August. Four hotels near the conference site are holding blocks of rooms for us (their names and phone numbers will be provided to attendees at the time they are notified that they've been selected to attend), but they'll book up fast. Get your hotel reservation in as soon as we notify you that you're invited.
The meeting is being held in a Boeing building. That doesn't put any restrictions on who may attend (the building's main purpose is to house training facilities for airline mechanics from all over the world), but it does imply that the Boeing people who manage the building will need the name and nationality of every attendee.