I've had the pleasure of jumpseating on Jetblue on multiple occasions, and I must also add that they are great. The crews go out of their way to welcome you aboard, and the gate agents treat you better than a passenger...I have to admit I'm a bit jealous, we don't get treated like that on our mainline partner.
So to all the Jetblue guys and gals a big thank you for making jumpseating with you a great experience (oh and the satellite tv rules! ).