[Nicolas___]

There are many ways to share knowledge.

The most obvious would be "write a blog". But to be honnest, you may as well use your knowledge in the process of building a tool to share it :)

Here comes the engineer approach : List your knowledge, structure it, and think about how people would like to get access to what you have to offer. You might come pretty close to what Khan has done with http://www.khanacademy.org/

Feel free to contact me (nsebban at google's mail thingie) if you want to talk about this topic in more details...