If you happen to live near the NEC, folks on the railroad.net forum posted this:
"On Friday, February 7th, ACS-64 #600 will operate on revenue train #171 from BOS-WAS"
http://www.railroad.net/forums...153149&start=270
Southbound Amtrak sched for train 171 departs Trenton at 1:33 pm.
I'll be trackside at the Holmesburg interlocking, still deciding whether to capture video or still.