This link is the oldest reference that I could find on the Net. I cannot promise the link will work. Google picked it up. It appears to be an archived story.

I thought it was a new word but was not sure. It's from the March 4th issue of Time. It might be the first usage since the word appears only in the title of the piece and seems to be the hook for the story. I found it quite disturbing. Military Entertainment Complex is an older and establish term with a different meaning, I think. (From the joint ventures between the studios and the military with a military applications, unthinkable senarios and creative/realistic training materials.) A search of the Internet shows the use of the word to be fairly common at this point. My interest was actually sparked by either a question or reply between Dan Rather and a BBC interviewer. It was not clear from the BBC story.

http://time.qpass.com/time/magazine/notebook/0,9485,1101020304,00.html