Good thoughts, but there is something that doesn't make sense about the whole Witch Burning thing. After the fire went out, Dumbledore's body was gone, but with the Flame Freezing Charm, there still would have been a body since they were still there to make fake shrieks of pain. Do you get what I mean?

Seriously sirius: Nice thinking on the whole Snape not being into the curse so it not working theory. But I still agree with BuffyBuff, he's dead. JK.....okay, in truth she might actually mess with death, so I'll just keep my mind open.