I think it's great idea! I don't think there's a risk of copying Andys book, since you're aware of it's existance. Besides, what Andy writes is found in many artbooks and is basic information on any decent artschool.
I would love to see more indepth articles of fewer subjects though, and examples of their uses rather than just stating that a certain "tool" exists.
If there's anything I can do to contribute to this great initiative just tell me! I've studied visual art full-time for about 3,5 years (even though it doesn't show in Victrinia Ensor fantastic art-thread. Trees weren't my "major"
).