One of my favorite conferences each year is NASAGA. It starts Wednesday night and runs through Saturday in Valley Forge, PA. It's a chance to explore games and simulations in traning and teaching - you play many games and explore how you could apply those games to different settings.
More information is at http://www.nasaga.org/page/conference-2011
You can still sign up at http://www.regonline.com/builder/site/?eventid=976185 and get hotel rooms at http://www.radisson.com/nasga/! Come, learn, and play!