they used to sell these LED things that would fit into dome light slots. There was 4 different colored LEDs on it that flashed intermittently, and that was kinda cool. $15, tho, and the crappy thing is they'd go out after a month. Typical, really.

Other than that, I've seen normal bulbs painted two-tone, like purple/green, and shit. The local speed shops sell alot of that stuff.

As for staying OEM, you have a few options on the 96-00's... The 99-00's actually got map lights up front, but the 96-98's were shafted. I bought a map light from the local pick and pull from a db+ integra, and it goes right in there. I had to cut away at the roof a little, but it looks great, and the utility of it is awsome

Another thing you can do is something I've been wanting to do, but haven't gotten to it yet. Acura made the Vigor, and it has lights for rear passengers mounted on the c-pillars. I have a set of those I may eventually install, but I'm not really in any rush. I could care less about back-seat comfort