Got stuck in Denver yesterday thanks to this. Flight was delayed for 2.5 hours, airport was insanely crowded and the poor lady at the Southwest desk had a never ending stream of people asking questions she didn't have answers to. The airport bar was certainly making a heck of a lot of sales, though!
On a serious note, it seems somewhat of an oversight that Southwest's entire multibillion dollar operation can be ground to a halt due to the weather pamphlet printing system breaking. Talk about single points of failure!