I've flown nine segments on AirTran 717's this year. The planes are new, clean, and comfortable. At 5'11.5" and 188 lbs., I find the seat pitch in coach just fine, at least as good as US Airways which I used to fly. The seats are contoured, which helps with thigh and lower-back support. I get the same drink and pretzels I'd get on US, and a mainline jet plane. Except I pay far, far less than I would on a Cartel carrier. And on AirTran, I'll earn a free ticket in less than a year of flying them...far faster than I would on US.
AirTran will probably eventually reach the West Coast. Unfortunately the 717 can't do ATL-LAX (or ATL-SAN) nonstop, they'll probably have to get 738's in order to do transcons. However, they'll probably want to digest some of the cost of replacing their DC-9's first. From what I read, the DC-9's are kind of shopworn inside.
I wouldn't be surprised to see JetBlue running JFK-SAN within a year. However, they probably won't add any new cities (other than LGB-related LAS) until they fill in the remaining LGB slots, which will likely absorb their new aircraft deliveries for the rest of this year.
Need a new airline paint scheme? Better call Saul! (Bass that is)