I got into an accident. only thing that happened was my reverse light broke. anyone know how to replace one of these? thanks

On the back of the housing there is one or two screws and two plastic clips that attach it to the back-side of the rear bumper. The whole plastic housing and attached clear lens just pops out in one piece.

As Cionide said, they are held in with one screw and I see them on eBay all the time! Very easy to replace!

Very easy to replace!
Very easy to make much brighter and more effective also:

http://www.scionlife.com/forums/showthread.php?t=160258

I did the Mod, definitely recommended! Easy to do and as long as you have the light out anyway, you should consider it. You could also practice cutting your old housing if you are a little uneasy about modding the new housing.