This mod was created by zeeksphere (original post). Also he develops bukkit plugin )) Let's help him!
Interesting, hopefully notch will support UTF or Unicode. But I don't think you can make it to bukkit since it needs a client mode.
Well, normal (chat+signs) translation requires client&server modification too. This mod makes possible normal server log (without ??????) and translated commands. P.S.: it WORKS for bukkit, but a bit laggy
Oh helping logs is alsoo good. But I wonder whether he sent his patch to bukkit devs if he patches the craftbukkit itself. I think they could add it to releases.