Coupla things keep annoying me about this.
People keep talking about correlation between the new title and Godric's Hollow. The word in the new title is Hallow (with an A) not Hollow. As in "Hallowed be thy name". Meaning something which is sacred or revered.
The other thing is all the discussion about the word "death" in the title meaning Harry's gonna die. Sorry, I don't buy it. It's Deathly not Deadly. I don't think I've ever run across the word "deathly" before.
I think the word in the title is about the Death Eaters, not death in general (or Harry's specifically).
So, I think "Deathly Hallows" is about things that are sacred to the Death Eaters. Probably the horcruxes. (... or is that Horcri?)
I could go on and on about what I think's gonna happen in book 7 ...