Yes, it was publicized here a while back, although I'm not sure if received any fanfare from DL, that, SEA/JFK is no longer considered a "transcon" with Business Elite / Delta One service. That isn't to say that, those planes won't pop up every now 'n then.

Here'za thread from yesterday that there are flat bed planes on SEA/MSP!

http://www.flyertalk.com/forum/delta...-lie-flat.html