From the descriptions I've heard of the content of this book, I don't understand why anyone would buy it anyway. The truly "new stuff" (pages for SM and Black Templar variations of the StormRaven, dogfighting rules, and the very minor rules tweaks that are already in the faq's) sounds like it would fit in a 4-5 page White Dwarf article, and then as a bonus, they throw in all of the rules from existing codexes for existing flyers, and charge $33 for it all together in one volume. How is this useful to anyone? What's next "Death with Hooves" where they print all the cavalry units from every codex together in one hard cover volume?
I was hoping it would contain significantly changed rules and/or points adjustments for existing flyers. This would have made a lot of sense considering that flyers became a drastically different unit type in 6th edition, so it would be tough for costs for previously printed units to remain appropriate...