About the Gameboy Development Wiki
The GBDev Wiki is an effort to collect and systemize information about the Game Boy's Z80-like CPU, its hardware, tools for software development, perhaps example source code, and serve as a reference for people who might be interested in Game Boy software development and hardware modification. The information is out there. But as I see it there are a couple of problems that with the fact that the information is scattered over the internet.
Therefore, I believe a Wiki is a good format for the information.