Oh Apple, how ever did you think you could keep developers from breaking down iPhone's backdoor. Hmm? Not only have developers managed to find their way inside, knocking over lamps as they stumble in the dark, but one developer created a rather illuminating piece of software. meniacal laugh
Lights Off is the first, that we know of, "unofficial" game for iPhone. The first of many perhaps. The goal of this simple puzzle game is to switch off all the little blinking lights in order to advance levels. Installing this code isn't for the faint of heart. It involves a bit of rubber chicken swinging and poking through iPhone's hidden file system. Full instructions are on the site.
Don't forget to turn out the Lights! Heh heh. Get it? Lights? Turn out...with the...oh never mind.