Apparently more than Voldemort who had damn well better be disposed of permanently!

Rowling has already said that the final chapter of the seventh book was written long ago.
“The final chapter is hidden away, although it’s now changed very slightly,” she said in an interview broadcast on Monday on Britain’s Channel 4. “One character got a reprieve, but I have to say two die that I didn’t intend to die.”
When asked to be more specific, she added: “No, I’m not going to commit myself, because I don’t want the hate mail or anything else.”

The hate mail comment is rather ominous but there will be many unhappy fans if any characters die who are not part of Voldemort’s crowd. Ok, there are probably some folks who identify with Voldemort and company as well. Your speculation can run amok on this idea.
There is a link to a video of the full Rowling interview at Mugglenet.
What I’d really like to know is when the 7th volume will be published. If it is June/July 2007 then I can complete my rereading of the first 6 at the leisurely pace of one every two months.

Then again, one per week over the 6 weeks prior to publication may be a better level of immersion.