I installed LED's in place of the stock bulbs in the rearview mirror and lower courtesy lights under the dash in my vert.
They're really bright, make a huge difference and look really cool at night with the door open.
Pardon this terrible pic. You can't see the rearview mirror, (note a glow on the center a/c vents) but can see how bright the courtesy lights are even though the sun is shining into the window of my garage. LOL
I'll try to take a better pic tonight if interested.
I do agree that it would be cool to somehow slip in a small LED under the window/door lock switches to highlight them. I da know? I also thought about installing a low power LED under each seat to highlight the floor while driving. "anything to lighten up an otherwise dark interior"
however my most favorite way is to drop the top.