I predict JetBlue will introduce some sort of Coach Choice program as NWA has. http://www.nwa.com/features/coachchoice/ This is a way to get additional revenue without raising base fares.

Also, I predict JetBlue will figure out a way to reward its most frequent fliers. Many industries (and certainly airlines fall within this camp) reward their top-tier customers differently from mid-tier and bottom-tier customers. JetBlue can attract more customers or get them to fly more frequently. Right now from a rewards perspective there isn't much incentive to fly more frequently.