I will just list what I can think of, some I probably have, some you may have already listed.

Home
Icons for Rooms
Tivo
Bluray
Netflix
Cable _box or whatever, I usually just us a TV
Satellite
DVR - covers last two
internet Radio - I use a globe icon
Pandora
Power - different colors
radio
Something for local inputs, usually L+R audio or 3.5 jack/cable, sometimes w/video
Apple TV
Ipod Dock
Squeezebox
Sonos
Game systems, i prefer to use the actual system - Wii, 360, PS3
Computer
Door Cam
Cam System
Light bulb -

For many icons I think a good before & after or Active state is important or at least a really nice feature. I usually just make the after state smaller to sort of look like the icon was pushed in.