Don S. Davis, recently most known as General Major Hammond of Stargate SG1 has sadly passed away on June 29, 2008 his family and GateWord says.
To me Don seemed like a very nice guy and he really did a great job of being General Hammond, tough and like a father figure at the same time. Wish I could have met him - friends say he was really great at conventions, a truly nice person and a very good actor.