According to Amazon, the new edition of the book is due to be available next week, and currently it’s priced at $15.74, which is 37% off the retail price (click the book to pre-order it now).
In addition to covering what’s new in iMovie HD 6 and iDVD 6, this edition is one of the first full color Visual QuickStart Guides. Every screenshot is new, and based on the PDF previews I generated, it’s going to look amazing. (I won’t see a physical book until next week at the earliest.) I’ll post a few sample pages here soon when I get a chance.