I have about 95% of catenary construction completed on my layout
Here a latest video that shows an Acela with a TGV lenz sound decoder running off of catenary, a gg-1 led freight train and various trolleys running through an HO scale Philadelphia.   All trains and trolleys are DCC controlled and run off of live wire.

http://www.youtube.com/watch?v=Yj3vQ77p0DE