It is kinda like Star Wars. He becomes evil at the beginning of the book like Anakin Skywalker and then sacrifices himself to save his two friends thus becoming good again and the evil leaves him.
He Does, but is Resurrected soon thereafter.
Harry Potter will die at the end; however, he will not be murdered. He will give himself as a sacrifice to save his friends, but is then resurrected because he has fulfilled his destiny.
He later marries Ginny and they have three little wizards and send them to Hogworts school.
**This way he goes out a hero and will not cheapen the series or his name. This will also please the die hard fans and will not leave them feeling let down.
http://en.wikipedia.org/wiki/Harry_Potter_and_the_Deathly_Hallows