Managed to tear through it last night, and I loved it. Like the review above, many (but not all) of the items, spells, etc. were just natural consequences of the material before rather than "above and beyond" surprises. But that's fine, the stuff in there is solid, and I think very helpful. (Oh, and there's a couple minor glithces like the PrCls that gains spell casting levels, but has no spellcasting prereq, or the two almost identical sidebars on facing pages, but those are trivial.)
What I found the most useful part of the book though is as an idea generator. I found it impossible not to think up adventures, characters, even new feats and PrCls while reading this. There are so many great ideas in the book, as well as seeds that spawned ideas in me noggin that I was tempted to do exactly what the book suggests not to - start littering the world with dead gods. But I just wanted to use so much of the info in here.
For me at least, it succeeds at everything Monte set out to do with an Event Book. It can be used in any campaign, but the ideas are so rich (and so is the artwork by Sam Wood), that it could even be the basis for a campaign in and of itself.
The only thing I would ask for is more. More adventure ideas. More campaign ideas. More discussion of undead gods like stated above. More spelled out examples of the sites of fallen gods. And I'm not asking for more because the current book is lacking, but because it is so great that I couldn't get enough of it.