There's an article in Aviation Week ...
Link.
Otherwise, I can't find any other news coverage, yet.
As I mentioned in the DL forum thread, ATL basically built two new security checkpoints just to accommodate Clear. Man, were they pushing that service. I had one guy following me down the hall towards the new elite lanes asking me over and over again why I want to wait in line, implying I wouldn't with Clear. I got to the elite lane and there were five people in line.
Still pretty amazing and shocking. Sad for those loosing their jobs.