I'll go first.
Well, how to put it without it without sounding like a kool aid drinker.
The ride up on JB was like SWA, only better- mmmm leather seats.  I didn't think the live TV would be a big deal, but I caught myself keeping up with sports center and a ball game on the way north.  The SWA flavor is evident.  I also think some of their smiles were due to the slightly successful IPO that went down a few days earlier.
 The interviews were a carbon copy of SWA, the gouge is right on.  I met a lot of quality guys the night before- not so many military, lots of US Air and Amer West folks.  I sincerely think the interview would be better with a beer and pretzels at a bar.  To get where you are, you can fly, they just want to see what your people skills are- are you someone who can be social and talk, or are you a slam clicker on trips.  I was lucky enough to get to Ex Navy guys, so I could use the Navy lingo with them.
Al Spain is also a man with plan. He talked at length with the interviewees while waiting to be called.  The company is basically kicking A$$ in the number of butts in seats department.  What is slowing up their expansion is not cities or business, but a lack of aircraft and aircrew to fly them- which is a good place to be.  Long Beach is also a complication they are dealing with.
Their were about 80 guys (that was the number tossed around- nothing official).  It seems that they are interviewing in masse to fill a few months worth of upcoming classes.  We were told to expect an email on Monday for good news- moving to the next phase, or a letter for the bad.
Editorial-
For me I am sold on JB.  Not to say SWA et al arent good companies, but JB seems to have taken what works from all the others and incorporated it.  They are a company that was formed after deregulation so are designed with this business enviorenment and are sticking to their gameplan.  
The majority of my 'advice givers' say they aren't a proven commodity and have no track record.  I am sure original FedEx guys heard that same line when they went there over Pan Am.  The JB pay plan is pretty darn good, probably a lot better than when SWA took flight.  Also, I think that it will evolve as the company does.  Also, I would rather get in on the ground floor of something with great possibility than be pilot x of many thousand.
No airline is exactly perfect.  I have a hard time listening to the NYC accent, and please, someone break up the Yankees, but I think I will get over it in time.  In the meantime I look forward to hearing things like 'growth', 'expansion', 'awards', and 'profit' from my CEO instead of 'hemoraging money','furlough', and 'strike'.
I guess I got off topic a little, but wanted to add my take on things.  Bottom line- if your suite is ironed, you can look people in the eyes when you talk and smile and enjoy your time at the interview session, I sincerely think you are ahead of the game before it begins.  A couple of good war stories and and the ability to tell a story both complementary and critical of you will be all you need.