http://www.nytimes.com/2007/06/26/books/26pott.html Cute. About the Book 7 spoiler anxiety. But seriously, it spoils Books 5 and 6, so don't read if you're behind for some reason.
Also, for the more particularly geeky among us, I must point you to this piece on alchemical correspondences in Harry Potter which is sort of "this theory works, but we're working so hard to make it work, we're not sure if it works and lots of people writing about it have shitty citations." That said, it's a pretty cool read. http://hogwartsprofessor.com/?p=62#more-62
Also, for the more particularly geeky among us, I must point you to this piece on alchemical correspondences in Harry Potter which is sort of "this theory works, but we're working so hard to make it work, we're not sure if it works and lots of people writing about it have shitty citations." That said, it's a pretty cool read. http://hogwartsprofessor.com/?p=62#more-62