Possible HP book 7 spoilers
So, I was watching Harry Potter and the Chamber of Secrets last night, and something came to me. Dumbledore tells Harry, "When Voldemort died, he tranfered some of his powers to you."
Holy shit, Harry is the last Horcrux.
When Voldie was dying, that was his last act, to make Harry a Horcrux, thus fulfilling the prophecy he never heard. That's why if Voldemort is to die, Harry has to die too. That's why Harry can speak Parseltongue and read Voldemort's mind.
God, I'm awesome! O.O