As recently as December 2007 they were receiving carloads of wax from the Pioneer Valley RR in Holyoke, and trucking it to the plant. I was on a speeder run 12/1/07, and we had to stop on the siding to let the Santa Train switch ends and pass us after a stop at the carosuel. Freaking cold that day, so standing near the steam was a nice treat...they weren't actively unloading, but the pipes were still warm. And on a day that struggled to get above 10*F without the wind chill, any heat was nice!
Here's a shot of the PVRR Santa Special passing the tankers of wax, and the speeders
http://www.nanosphoto.com/gallery/displ ... ?pos=-5409
I can only assume that nothing has changed with that arrangement.
If you're curious about the actual speeder run, head here:
http://www.nanosphoto.com/blog/2007/12/ ... -railroad/
-Tom