A wiki would be the best place to write (each one of us with a page) because we can see what each other is doing and eventually give suggestions or collaborate.
Barbara's reasons for using a wiki for collaboration make perfect sense. Perhaps the wiki could also become one format for the final product (in addition to a purchased print copy).
This also raises questions about charging for the book, and distribution of revenue. Interesting how each new topic leads to more! :-)
I'd like to propose that we offer this book as a download free of charge, with the option to purchase a print copy. How does everyone feel about that?