Welcome to the world of posting
I did see a CLEAR setup of some kind when I last went through SFO a couple of weeks ago. That's all I can tell you about it at SFO.
Regarding CLEAR in general, you don't get much for your $100. Your wallet does get lightened, though. Have a look at the Travel Safety & Security forum for more information than you could ever want on the subject.
This topic really belongs in the above-mentioned TS&S forum, not in the Continental forum. Please continue to follow it in TS&S.
Xyzzy
CO forum moderator