A couple of weeks ago I waited out the last East Coast snowstorm and got on a flight out of DAL to BWI. On this flight were a number of SWA middle managers leaving a meeting at the SWA HQ. In the seat behind me I overheard a conversation that SWA is exploring service to SXM through BWI. I did not hear mention of other hubs. Nor did I hear a timetable. If you want SWA to add service--you should let them know.