Harry has to kill Snape as revenge for Dumbledore. My money's on a Weasley for the other - Ron or Ginny.
No, I have a real strong feeling that Snape's offing of Dumbledore was not as it seemed.
Snape may turn out to have been a good guy all along.
Actually, I think Voldemort kills Snape for double crossing him. Or it'll have someone to do with the Unbreakable Vow.
And Voldemort will already suspect.
and
Why The Half Blood Prince Is The Best Book
They are long reads but really good. John Granger has been excellent thoughts on the HP series - especially the section on "Stoppered Deaths". He also describes the alchemical keys to OotP, and THBP. OotP being the nigredo stage (Sirius's Death, THBP being the albedo stage (Dumbledore's death) and the last book being the rubedo stage (Hagrid's Death?)........
My bet is going to Hagrid or Neville. Voldemort is obviously one of them.
Okay, now back to real life.....