Yeah, it's the retro-757. Been around for a while. It was painted up to celebrate the JFK-LAX 40yrs of trans-con jet service last year. When the paint scheme was first done, it was "on tour" and did some charter ops, ie, Oprah Winfrey to NAS. It's just in the regular dispatch pool right now as far as I know.
BTW, there's suspose to be a retro-737 sometime this fall.