Prelude,
Nice tutorial
Have you ever thought to publish a textbook?
I am currently working on one in C# programming which is due out at the beginning of next year.
This experience has been an eye opening one for me.
You seem to have great style, may have to clean up some of the language...
I sure you have looked, at what is out currently in C books. Most are primarily reference, few are actual textbooks.
Anyway, I know the contacts at 3 of the publishers of CS books in the US... let me know if interested.