Excellent job Daniel. For discrete power it might be nice on the detail page(not component browse page) to designate if there is a work around (i.e. Play = Power On, Play, Pause, Power = Power Off or number pads for the cable boxes.). I wouldn't consider Play a power discrete code. Maybe you can have a Yes with an asterisk that says look at notes.

Also maybe there should be something for RS232 that is the same that designates a device requires 2-way communication. A device like the Sirius SCH2P comes to mind.