After all the waiting, the book is out! Available for example on Amazon, both as Kindle ebook and as a paperback.
You can see the actual table of contents in the Amazon preview; in short, it covers the whole range of multitenant related topics. Both multitenant-specific, as well as the old and proven features, that were updated to work with a multitenant database.
With a bit of luck, you'll get the book sooner than me - my copy is still somewhere in the mail :-)