Atheism, diffused?

I am taking a Christian worldview course, and we are studying atheism and existentialism.  Discussions have led to Madelyn Murray O'Hair, so I did a little research on the side of her life and position as a self-professed atheist. I have only found more gems of ignorance from her than what I thought existed, but this audio clip really struck me:

[audio https://sites.google.com/a/plaidradish.com/audio/home/audio-files/OHair_on_Atheists.mp3]

In essence, her point being that it is totally impossible for a Christian to prove that their is a God. It got me thinking:  Is my life proof that there is a God? I mean, disregarding the historical evidence we have today about Jesus' existence and the obvious dependency of the known universe on a divine, supernatural creator from which complex life originated, let's just get down to the critical question: am I so different, now, as a follower of Christ that others couldn't help but believe that there must be a God and a savior to transform a life in such a way?  The change that took place in me should be that of a life being "lived out loud" in the eyes of those who do not yet believe, right?

thoughts?
-jeff
*if you would like to hear the whole 3 hour debate - and it's painful - listen here:
[audio http://www.bringyou.to/MartinOhairDebate.mp3]

or, watch something FAR more uplifting and encouraging: