Wayne Hammond and Christina Scull have updated their website and here given the updated release dates for the Companion and Guide. 2 November for Harper Collins UK and later in the month for Houghton Mifflin. Christina Scull recently had surgery which delayed the book slightly and I'm sure we would all wish her all the best and a speedy recovery.

There is also a list of the main topic headings for Volume II just to wet your appetite.

There is also some information about the Tolkien Collector and an annotated collection catalogue of Pauline Baynes.
here's the link
Wayne and Christina's website

I'm getting more and more excited about this book and I'm counting down the days