BSDCan, a BSD conference held in Ottawa, Canada, has quickly established itself as the technical conference for people working on and with 4.4BSD based operating systems and related projects. The organizers have found a fantastic formula that appeals to a wide range of people from extreme novices to advanced developers.
BSDCan 2011 will be held on 13-14 May 2011 at University of Ottawa, and will be preceded by two days of Tutorials on 11-12 May 2011.
There will be related events (of a social nature, for the most part) on the day before and after the conference.
The list of events is available on the website.