In studio vid's they seem to like the Effector 13/Devi Ever pedals and Death by Audio among the other more well known boxes
I own the Truly Beautiful Disaster...and it is.
Trent seems to be in a mostly (always a caveat) modular/analog phase
at this point.
Photos of NIN/Devi below.
MySpace.com - devi ever : fx famous people's devi ever : fx