The United Premier Access lobby at LAX as of this Tuesday has a TSA PreCheck lane. And boy is it nice. When I went through no one was in line and I breezed through in less than a minute. I was even chided for taking my laptop out of the bag. Can't wait for SFO to get this, particularly since they have recently gone all nude-o-scope at T3 and only use the metal detectors for kids and seniors.