Handled by Air Tran, with the gate having been pointedly moved down the concourse, giving the feeling of being demoted to the kids' table at a holiday party. Though AS 737 is codeshared by Delta (9173, I believe) they showed "TOC" as the gate number on screens -- whatever that means! Sky Club service desk had to call over to the D Concourse to verify it's now D8 (not D14).