If what I read quite a while ago on AVSForum is true, I can't imagine Dish ever carrying Epix.
What I read was that Epix repeats as much as Voom or Smithsonian.
Digiblur seems to think the fact that the EPIX HD channel (TMP65) was assigned a Dish Latino number in a previous uplink means the contracts have been signed as he says they usually don't do that unless negotiations are complete.
On the Scotty Chat audio podcast last night (around 55:25) Scott mentioned the holdup was about getting authentication for E* customers to use the EPIX website and some problems they were having.
http://www.blogtalkradio.com/satelliteguys/2010/02/09/scotty-chat.mp3?localembed=download (Mp3 link)