Making an Accessible website

I found a very good online book on making an Accessible website. The title of book is "Dive Into Accessibility" Author has taken some real life scenarios. He has talked about different type of disablities and how can we make our content accessible for those people.
Interesting fact is that, through-out the book, examples are given on customizing a MT blog to be more accessible. That's interesting, I am reading the book once again and hopefully customize my blog to be more accessible.