Book reviews: Blog as you go?

© Chris DeversWhat do y'all think of book-reviewing as you go?  I've seen this on other blogs, tried it a little for The Idiot, and rather enjoyed it.  For large books, it seems like a good idea.  From the blog reader's perspective, this does inherently involves spoilers--still, for books one has read already or never plans to read, it's a good way to mull over the story "from afar" and/or discuss old favorites/least-favorites.  (Plus, The Brothers Karamazov is still on my nightstand.  As I didn't get farther than the dramatis personae, this could be an incentive to get me to actually read it!)

What say you?