If you live in these three select cities, you have a chance to go see 300 on February 21st, which is 3 weeks before it releases!
AMC Metreon IMAX
101 4th Street
Navy Pier IMAX Theatre
700 E. Grand Ave.
259 Richmond Street W
The doors open at 6:30PM also read this (VERY IMPORTANT):
If you have a MySpace, printout your profile with the 300 profile and the Black Curtain profile as your friends on your top friends list. If you do not have this, you can't get in and see the movie.