I bought this title partly because I usually follow Scoble's adventures and commentaries in my blogroll, and because I am quite fond of Channel 9 videos (for those who may not know, videos from inside Microsoft). And I bought it as well expecting to find more sound advice on business blogging. I have to admit that, as it is usual with customers, I can't really pinpoint what I mean by "more sound advice", but, being honest, I don't consider a myriad of blogging examples to be illuminating when there's no analysis of those examples or, when there is some insight, it does not go very deep.
My advice is this: if you already are blogging, if your blogroll is full of prominent business references (people like Scoble himself, Guy Kawasaki, Chris Anderson, Seth Godin, GapingVoid.com, and the likes, you know, the usual name dropping), then you don't need this book, and most of its content will be merely anecdotical or, sometimes, boring.
On the other hand, it could probably be very useful for the clueless folk in marketing. But then they will not probably be very open minded about the ideas conveyed in this reading; and they won't even know about Scoble and Israel in the first place.
However, let me stress that this is not for lack of quality in the book itself, but because this book has somewhat missed its audience for the reasons above (obvioulsy that's my personal opinion only).