Wouldn't worry about it at all. My speeding ticket list is extensive (7 in 2 years). Just tell them why, etc. You know the drill. If you are an excellent candidate, they are not going to send you home based on speeding tix. Believe it or not, good pilots still get hired with DUI's. (1 in your lifetime is acceptable, 2? then worry).

Get hired by SWA and go fly. Have fun!!!