PIA has been using a MMW with ATR for the past couple months or so. I had the "pleasure" of opting out a couple of weeks ago. They have one WTMD and one MMW, but they were funneling everyone through the MMW.
Does anybody know if BMI has the MMW yet? They were listed in a press release recently that they were going to get one. I get to fly out of there next week and am hoping to avoid the MMW scanner.