they sometimes have codes on the snak pak boxes provided on longer flights
the "reg" promotion codes seemed to have gone the way of the dodo bird as eveyone and their brother were using them even though the code was just meant for "target" audiences ie for one particular person
they seem to be doing more promotions with "credits" for award travel and good ding fares/sale fares, thus no need for other discounts
The last time I got a promotion code was in February, 2005 and it was on a postcard specifically tied to my Rapid Rewards account. It was a one-time use code. I think SW has gotten smarter about releasing codes and making them one-time use codes because, in the past, they were plastered all over the internet when SW was specifically trying to target a certain audience.