A conference rate of $129 has been arranged with the Red Lion Hotel for conference participants. Please contact the hotel to make reservations at this discounted price. Also, here are some good links for finding affordable hotels in the area. Most hotels under $100 are slightly north of the conference, but definitely still within walking or bussing distance.
Seattle Super Saver - book lodging via this Seattle Convention Center & Visitors Bureau website.
HotelMotel Now - links to discount and mid-range hotels in downtown Seattle.