robbed, WN just announced a flight from SNA to Mexico.
It does appear that WN will focus its int'l ops on BWI, HOU, and FLL with a few routes thrown in elsewhere. it is good to see WN developing its int'l network and I am particularly looking forward to their HOU and FLL announcements because those cities have large ethnic populations and geography that will favor flights deep into Latin America.
in the meantime, BWI will be a great point from which you will be able to see more int'l traffic than your airport has seen in a good long time. BWI's favorable geography in the NE and their large domestic operation should ensure that they will do well from BWI, probably with more of a leisure focus while FLL and HOU will be more ethnically focused.