Going back to y'all's discussion about the 7th book, I decided to re-read the first book. I'm about half way through, and so far I've come across a couple of interesting passages relating to what you were saying.

From page 85 (First American edition), at Ollivander's wand shop Harry has been chosen by a wand made of "holly and phoenix feather, eleven inches, nice and supple":

He put put Harry's wand back into its box and wrapped it in brown paper, still muttering,

"Curious... curious..."

"Sorry," said Harry, "but what's curious?"

Mr. Ollivander fixed Harry with his pale stare.

"I remember every wand I've ever sold, Mr. Potter. Every single wand. It so happens that the phoenix whose tail feather is in your wand, gave another feather-- just one other. It is very curious indeed that you should be destined for this wand when its brother-- why, its brother gave you that scar."

Harry swallowed.

"Yes, thirteen-and-a-half inches. Yew. Curious indeed how these things happen. The wand chooses the wizard, remember.... I think we must expect great things from you, Mr. Potter....After all, He-Who-Must-Not-Be-Named did great things-- terrible, yes, but great."
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Then, on page 126, after the welcoming banquet and the sorting by the sorting hat, Harry sees Snape for the first time:

Harry, who was starting to feel warm and sleepy, looked up at the High Table again. Hagrid was drinking deeply from his goblet. Professor McGonagall was talking to Professor Dumbledore. Professor Quirrell, in his absurd turban, was talking to a teacher with greasy black hair, a hooked nose, and sallow skin.

It happened suddenly. The hook-nosed teacher looked past Quirrell's turban straight into Harry's eye's-- and a sharp, hot pain shot across the scar on Harry's forehead.
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The first passage would seem to support the idea that Harry or his scar (or his wand ?) may be a Horcrux. The second passage hints that Snape may be a Horcrux.

t.