I voted Voldemort... he has to die, hasn't he? But I don't think he will be the only one.
I would say that Harry, Ginny, Ron and Hermione are pretty sure to survive, but just about everyone else could end up dead at the end of DH
My guess would be someone in the Weasley familily - I don't know why, but I have my suspicions that either Fred or George will die - and perhaps Draco or Snape... Lucius will probably die as well. I don't think any of the Dursley's will die.
Uuuh, I just can't wait for the book to come out