RFID/NextGen FP machines are currently being installed at Space Mountain... They will appear at Jungle Cruise, Splash Mountain, Winnie the Pooh, Peter Pan, PhilharMagic, and Haunted Mansion, if they haven't already... The machines are about 4 feet tall and are scanners... These machines will be located at the FP entrance where the CM takes your FP ticket...

I'm not sure how the testing will be handled, but Jim hill (yes, that Jim Hill) and Stitch Kingdom say Disney will select people via email (I'm assuming those who are booked to vacation during May 1 - May 15th) to test out the xPass/NextGen system... you'll be able to plan every minute of your itinerary and will receive a FP/xPass card... And then, let the testing begin...