You have to question the commitment NBCU had to Chiller for years considering that parent company Comcast never added it.
I don't know if it's shutting down for sure yet without a formal announcement, but with 3 of the 5 largest TV providers not carrying it (Comcast, Charter, Dish), it's not a good sign. AT&T/DirecTV hasn't dropped it yet, and that's the last sign of life, I guess. And here Cox just added it in HD.
NBCU is really thinning their herd down. I really think some of the other content providers should do the same.