Definitely a nice collection! Yes, there are a few "juice jacks" on this site. I have a strong interest in streetcars and interurbans, especially the Sacramento Northern and PG&E lines in Sacramento.
I have a few trolley models (Ken Kidder single and double truck Birneys, and some Bachmann Brills, and I'm kitbashing a Bachmann cable car model into a "California-style" trolley) and a couple of freight motors, but I don't yet have anything running "under the wire." My layout models a line which used to be electric (the Sacramento Northern) but converted to diesel-electric over the years. I do have plans to install poles and wires and thus "back-date" my layout to the electric era, I just haven't done it yet...
Trolley modeling has always been a small portion of the model railroad hobby, but many feel that it will encounter a renaissance in the United States, as cities realize that getting rid of their trolley lines was a bad idea and Light Rail Vehicles and streetcars once again become common!