Creation Entertainment is having a Stargate Con in Arlington, VA on February 5th, 2005.
The guest list includes: Michael Shanks, Christopher Judge, Don Davis, Teryl Rothery, and Tony Amendola .
Here is the link for more info:
https://www.creationent.com/cal/sgva.htm
P.S. - The con is a little pricey but may be worth it if you are a big fan of the show.
Enjoy,
Brandon