I would prefer that southwest revise their horrific boarding scheme first before they concentrate on further expansion. From personal experience alone I really don't think the "choose your own seat" philosophy actually gets the plane off the ground faster... especially since everyone boarding the plane does not take the first open seat.... but rather seem to pick and choose preferred seating which holds up the line way up the jetway on a full flight.

The best part about their seating system is the fact that if you board early you can avoid the screaming babies, and hyperactive kicking kids.

I personally would love to see Southwest go someplace outside the U.S., they certainly are due for it after 30+ years of operation.