I love this article -- this is my first exposure to data mining, and it really helped me "get it."
That said, PLEASE have someone with good English skills proofread and edit your posts before you post them. Typos and poor grammar seriously detract from the professionalism I assume you would like to project, and distract and confuse the reader. This goes for ALL technical folks out there. Just because you aren't an English major, that doesn't mean you should not make grammatically decent posts.