Regarding Harry Potter...

...Even though I plan to read it as soon as I can get my mitts on a copy, I don't plan on posting anything that might be spoilerish for a decent period of time after the book is out. As readers, how long do you think should I avoid posting any spoilers of the seventh book (even with spoiler warnings and efforts to hide the text)? Keep in mind that this book is at least 600 pages, and by some reports over 700.

I'm thinking that once I read it, I'll start a discussion in the comments of one of the posts and keep all spoilers there. Again, what do you think of that idea?

My biggest hope is that this book is a fairly good read, like the others, and that the various dangling plot threads are resolved neatly.