If you haven't picked up a copy of John Piper's latest book Finally Alive, you really need to. It's a great read on the new birth, there is a lot of misunderstanding as to what the new birth truly is. We are totally helpless in our sinful state and God in his sovereignty and grace quickens us to new life, new birth or being born again.
As the back of this marvelous work by John Piper states, "God is the great Doer in this miracle of the new birth. And he has not been silent about it. This means that he does not want us to be ignorant of what he does in the new birth. It means that knowing what he has revealed about the new birth is good for us. When Jesus said, "You must be born again," he was not sharing interesting and unimportant information. He was leading us to eternal life."
You can pick up a copy over at www.desiringgod.org for a great price, you definitely will not regret it.