Two spoilerific reviews of HP6 from CNN 
Check out
Readers shocked by new Potter book: Surprises cause emotion in many and
Review: Charm still strong in sixth 'Potter': Mysterious 'Prince' prepares stage for final episodeNeither of them spoil the
big thing, exactly (the first one goes out of its way to be vague by apparently omitting part of a child's analogy), but the second one pretty much tells you how things stand at the end of the book, so, you know.