Did you hear any specifics on what went wrong and when regarding the kiosks and credit card machiens? Was it DEN-specific, and did it last long?

Sometimes an outage like that will creat chaos in the system, but by evening when I looked at F9 in Denver it seemed like a relatively routine mix of on time and delayed flights. Hopefully the didn't just run on time while leaving lots of passengers behind. High load factors don't leave a whole lot of room for timely recovery, which is not unique to F9 these days but nevertheless can turn a run-of-the mill, crummy inconvenience into an angry, newsworthy situation.