As you will see in my Freelancer.com resume, I am an experienced writer in the area of science and health. The personal story detailed in your blog is something I would really enjoy writing about.
From what I read in your blog, there is more to your positive attitude than NLP, running and hypnosis. It seems to me that you had several interacting factors that helped you maintain a positive attitude, not least of which was the fact that you already had developed an optimistic view on life before the occurance of the cancer. It seems to me as though you were able to connect these techniques with an already positive attitude, so that the better you felt, the more motivated you became to do things which would, in turn, boost your spirits further.
It also seems that you ability to give, as evidenced in some of the non-cancer related posts, may have helped you keep a sense of meaning which also is motivating.
I would like to discuss further, and hopefully take this project on. Either way, I'll be reading the blog messages you sent, rather than just giving them a quick look over as I felt compelled to do before bidding on such a personal project.
I hope to hear back from you soon,
Jonas
P.S. I expect you probably envision the book in first-person. I would like you to consider the possibility of occasional narrated portions. I think the technique could bring out aspects of your experience in a way that a completely first person account could not.