Anyone added any extra interior lighting?

I have not done this yet myself, but I am thinking I will tap the wiring behind my drivers side kick panel to add some under dash lights. I want to illuminate the front floors. I work as a new car dealer, so I drive new cars every day. I don't necessarily like newer cars, but I do love the interior lighting options that are available. Our older cars are so dark inside with only one dome light...
I have also been looking at a whole vehicle LED change over. www.superbrightleds.com is a great site. Click on automotive and then select your vehicle year, make, model. You can choose all the needed bulbs right there and get the necessary load resistors or flasher units to use with the LED's as turn signal bulbs. Good luck and us know what you figure out. I will probably copy your ideas.