This year, FSOSS run from Thursday, October 25 to Friday, October 26 and features talks by some of the open source community's best and brightest. I think this event is an absolute steal at $40 (advance price; $60 at the door) or $20 in advance if you are a student. This includes both lunches, a reception, and two full days of presentations.
As an incentive to register sooner rather than latter, all entries received by the end of the day on October 8 (Thanksgving Monday in Canada) will be entered in a draw for an iPod Nano. See the FSOSS site for details: http://fsoss.senecac.on.ca)