I stumbled upon a pretty cool project mentioned on the insecure.org mailing list called the "Penetration Testing Directory Project". This project aims to be a directory for all things related to Penetration Testing which include tools, methodologies, companies, websites and more. This does seem something like the Hackerpedia, however, this project looks to be more focused penetration testing vs. hacking techniques and tools. Would love to see this project in a wiki type format one day.

Anyway, check out the project...looks like there is a pretty good selection of content already. Submit some links if you get a chance. It's always good to support community projects like these!