Grem,
In the constant battle to stay ahead of the pack, JetBlue HR folks continually upgrade and improve their interview process.
In fact, they ARE now cold-calling folks and doing a pre-lim interview. In fact, a retired 0-5 recently called me and got some help when they called his home while he was out of town. He wanted to practice a bit before they called him back!
I don't know how high the standards are for what they expect when they cold-call, but all the basic rules of thumb you get from guys like me, Rob Beeks, or Craig still apply. My advice is if you expect a call, start thinking about the interview NOW, and do all that standard pre interview prep stuff (like logbook review, story review, gouge research) early. If you wait until they call you may just find yourself scrambling. The questions they ask are very similar to the questions you find in all the website trip reports. BTW...I hope to soon have a comprehensive list of questions from debriefings on my website very soon. In the meantime, there are links there to will fly for food and aviation interviews.com, both sites that have some great gouge.
Good luck and get ready...JetBlue is ringing folks up this week.