Although it seems impossible that the date has already come, BIG FISH opens tomorrow (Wednesday, December 10th) in New York City, Los Angeles, and Toronto. It’s only on two screens in each market.
For LA, these are The Grove and AMC Century 14. Advance tickets for the Century 14 can be found at the usual places, such as Moviefone and Fandango. The Grove doesn’t use those services, although you can apparently reserve seats via their phone line, at (323) 692-0829.