CBP Global Entry System kiosks at the airport...
 

Anyone used one of these yet, I know you have to register on GOES?

What I can't get a handle on (and I've even spoken to CBP) is whether I can use my NEXUS card with it. On GOES it says that NEXUS members are included for free, but you have to swipe your passport, which doesn't make sense to me because NEXUS cards are machine-readable (and the whole point of having a NEXUS card is so that you don't need to get a passport).

Has anyone used one with an LPR card or NEXUS/SENTRI card? What did you swipe, the card or your passport?