WS, VERY good call on Neville. I hadn't thought of that one.
Rowling's said that Dumbledore "didn't pull a Gandalf"... but then, Gandalf never died. I've heard theories that Dumbledore really died but somehow comes back.
There's some excellent reading material on
Harry Potter - Beyond Hogwarts, although I believe that's been incorporated into another website.
Speaking of which, I should probably start rereading the series to prep for the last book. I finished book 5 in 26 hours and book 6 in 23 hours. Probably ought to put in for a vacation day after book 7 comes out so I can read all night again...