They were trialling the EXIT program in several airports in the US a while back and were supposed to be rolling it out on a greater scale but dont know how far it has gone.

On a similar vein has anybody registered for the IRIS programme available from certain airports in UK and does it really make reentry to the UK quicker? I didnt realise it was available at Heathrow last time we flew. Cant do it this time as its only available at Gatwick North and we fly from South Terminal (it's beyond security so you can only register when you are flying out from there).