As a very early reader of some of Wes's first chapters, I'm eagerly awaiting the final product. It's some fine work, and Wes is not one to cut corners in his exposition or skim over important things to know.
I hope this book will advance recognition of a great set of standard tools that will make working with imperfect data as painless as possible, in a tech stack that is very amenable to 'productionization'.
Consider browsing the criticism of Data Analysis with Open Source Tools(O'Reilly) for suggestions. Many people, including myself, expected a book that would have been more in line with what your book is probably trying to accomplish.
I was also very disapointed with DAwOST; it's a book about data analysis techniques with a bit of code mixed in. This is a book about _programming tools for working with data_, pretty much the exact opposite.
