What will happen in Harry Potter book 7?

EJ and I finished up the Half-Blood Prince a few nights ago. We are now deep in speculation about what will happen in The Deathly Hallows, due out at midnight tonight. Our copy is on pre-order, scheduled to show up at the house sometime on Saturday, but we will be visiting friends this weekend, so we won't be able to start reading it until Sunday.

Is Snape a good guy or a bad guy? We think he's a good guy with some "issues" (as one of my co-workers put it). Here's my question, though. If Snape was really a good guy, why wasn't he ever given the Defense Against the Dark Arts job? Was DD afraid the Voldemort would control him there somehow?

Is Dumbledore really dead? We hope not. We want to believe that Snape, as a spy on the dark side for Dumbledore, made the Unbreakable Curse with Narcissa with Dumbledore's blessing. If he made it without DD's knowledge, we think he told DD about it and they devised an elaborate plan for DD to go underground to help Harry finish finding the remaining horcruxes. This is what we want to believe, anyway.

But if you think about the conditions around DD's death (the curse on Harry was broken as soon as Snape killed DD, the loyal phoenix Fawkes sang a song of lament and left the castle, McGonagall assumed the headmaster's office which is charmed to only allow in the rightful headmaster, DD's portrait is now on the wall in the office, etc.), we suppose it's possible that he really is gone...we just hope a wizard with his power had the ability to make these things happen. EJ thinks that perhaps, somewhere in his past, maybe DD had to kill someone and he has a horcrux with another part of his soul in it.

How will the story end? Good will triumph over evil and Voldemort will die. We just hope that Harry doesn't have to sacrific himself in the process. I firmly believe that Harry is one of the six horcruxes. I think the scar on his head is result of being made one. I think when Voldemort killed Harry's parents, Harry was made a horcrux at that time, but I'm not sure whether Voldemort intended to or not. This might explain Harry's ability to speak Parseltongue.
I have no idea what the other two horcruxes might be (we know about the diary and the ring, both destroyed, and the locket, whose location is unknown). I still think the Gryffindor sword will have a role to play in all of this. If Harry has to make a sacrifice, perhaps he will lose his ability to perform magic, which would effectively eliminate any effort to write another book in the future, but not kill the main character (so that he can continue the obscene marketing campaign, of course)!

Who will die? I think Snape is a goner either way, especially if he's on the good side. He'll sacrifice himself for the better good. I don't know about Draco or Lucius. I'd like to Draco come to the good side, but I'm not sure it will happen. Bellatrix? I hope Neville gets his revenge on her. Members of the Order? I think Tonks, Lupin, and Hagrid won't all be around by the end of the book. As for the Weasley family, I think that there are interesting options there. I don't think it will be Molly or Arthur losing their lives. Maybe Ginny, as Harry's love interest? Fred or George, finally being "responsible" and fighting a good fight? Bill? Nah...the storyline of him as a garish werewolf married to the stunning Fleur is too good to end. Percy? Nah...he needs to realize that the Ministry of Magic wasn't right.

What will happen to Hogwarts? I'm not sure if it will be open this year. Who would teach Defense Against the Dark Arts? Will Slughorn still teach Potions? If McGonagall is headmistress, who would teach Transfiguration? I can't imagine the school not being open...I hope it is.

Who is R.A.B., who has the real locket? I think it's a member of the Black family. I looked in Book 5, and the Black family tapestry had a name on it...I think it was Regulus or Regimus? That's the only think I can think of!