Yep, AvEx (AMC ?) have 2 large hangars (a 747-400 will fit in them) that were originally going to be used for heavy maint on the far SW area of the airport, right off of the end of Runway 3/21. One is being used all the time for United Express (I can't remember their Regional Partner here...) as a maint facilities for their Turboprops. Also the owner of Evergreen Internatioal (EZ) uses part of that same one as storage for his personal aircraft collection. The other is a paint hangar, I've seen FedEx, JAL, NW to name a few in there getting new paint jobs.
Horizon (QX) completed a newer maint facility a couple of years ago, but I don't know how intensive it is.
The airport just built a ground run-up enclosure hoping to draw more maint bases in but who knows.
Sorry I rambled a bit...hope it helped.
is that a light at the end of the tunnel or just a train?