chapter titles...
Since these are from AINC, I would take them with a grain of salt, but here goes the wild speculation.
These are the supposed chapter titles for HBP. Based on the last few, I think it is a safe bet (if they are trustworthy) that Dumbledore is dead dead dead.
1-The Other Minister
2-Spinner's End
3-Will and Won't
4-Horace Slughorn
5-An Excess of Phlegm
6-Draco's Detour
7-The Slug Club
8-Snape Victorious
9-Half-Blood Prince
10-The House of Gaunt
11-Hermione's Helping Hand
12-Silver and Opals
13-The Secret Riddle
14-Felix Felicis
15-The Unbreakable Vow
16-A Very Frosty Christmas
17-A Sluggism Memory
18-Birthday Surprizes
19-Elf Tails
20-Lord Voldemort's Request
21-The Unknowable Room
22-After the Burial
23-Horcruxes
24-Sectumsempra
25-The Seer Overheard
26-The Cave
27-The Lightning-Struck Tower
28-Flight of the Prince
29-The Pheonix Lament
30-The White Tomb
So there is something to chew on until Friday night.
ETA: These are correct. That is all I am going to say other than the book is between PoA and GoF in length. And I got hold one and maybe read a little. Or not, Ms. Rowling's attack lawyers.