After reading the first five books, "HP-OOP" is best so far. I love the backstory and dark undertones. It is truly a scary book to read.
Anyway tonight on the CBS network news, I saw the first news story about HP 6 (at least on tv). The story was an interview of the guy who does the voices for the HP audio novels. He said another big character dies, but he wouldn't say who.
I guess we will hear more as it gets closer to 7-16.