The only LEDs I have in my car are the parking lights in the headlights - the little #192 (I think?) wedge bulbs. I have super bright white 6-LED wedges in there to match my HIDs.
What information are you looking for exactly? I'm pretty sure all the LEDs are plug-and-play for the interior lights. If you can change a regular light bulb, you can install an LED. Some of them might have double-sided tape (ceiling dome light might be one of them), but other than that, I think the install should be a piece of cake for most of them.