Ok, I don't know if this has been posted but I don't feel like checking. A simple, not too complex way to make doors with switches that would open them would be similar to teleporters. The "Switch, Door" would have a channel (0-10) and so would the Door/Window that would be opened by the corresponding switch. Doors and Windows with switches that you must use the action button to open would be interesting for Forge, and I'm sure many people agree with me.
But anyways, basically if you have a switch on channel 0 and a door on channel 0, when the switch is hit, the door would open. You could link multiple doors and windows to that same switch. I'm just bored so I came up with this.
[Edited on 09.08.2009 9:41 PM PDT]