Quote from Keybounce
Any chance you could give iPeer your source code so that Whats My Light Level can be made to work?
Here's the diff result after modding the Minecraft client 1.3.2 for incorporating the saturation bar. I still always update this mod, but you are free to use this code to mix it with other mods.
Follow the link: https://gist.github.com/3733669