In the past three years, I've seen more really nice looking gals on Delta's MD80s out of DFW than any other airline. I've never ridden JetBlue, but I suspect that they, and any other relatively young airline, have a real nice FA group. It may be hard to believe, but Spirit (my carrier) has our fair share of hotties. Unfortunately, they are well countered by the nags and -ags.
regards,
enigma