Ok, time for some anti climactic response.
I need to start this post off by stating that I do not believe in a God, nor do I believe in an absolute moral code. There are atheists out there that do, but I don't. Now, I must say that I do believe Darwinian evolution probably has ingrained in us a way in which we will innately act. (Even that is up for debate.) The problem is, just because we act in a certain way, what makes it moral? My main issue with discussing objective morality is that morality can't be measured. It is a word that was created, shaped, and defined by man, and man can't be omniscient to know what good or bad really is. So, the question is, what is morality and how do we measure it? Any response any one gives me will be contrived and not exact. Why? Because there is nothing to be exact about. Even if it does exist, which I highly highly doubt, we can never know it. We have no absolute good in this world. What we do have is a set of acts that we will most likely follow that have been ingrained in us for millions of years, but these are neither immoral or moral. They just are.
My personal view on morality is a sociological one. Why do we consider certain things immoral? I believe that our choices lie in our ignorance. What is the one thing many humans fear above all else? Death. Why do we fear death? Because we fear the unknown. Existence is all we know, and we are scared shitless of not being here anymore, of no longer being conscious. So, what do we do? We realize that we don't want to end the existence of others, because we don't want others to end our existence. So, follow the logic and you have murder being an immoral act. Same can be said for stealing, rape, etc, but the question is...what makes these immoral and not arbitrary? The answer is simple. Absolutely nothing.
At a very basic level, all our actions are meaningless, and it is up to us to define our meaning. Others might define meaning for us, and that is where our situation can get a bit sticky. In the end, our actions are merely actions, and nothing makes them innately good or evil, people's misguided perceptions do. The only difference between Hitler's killing of 11 million people and my hugging of 11 orphans is human perception, fear of innocence, and sympathy toward the innocent.
I also must add that Omega stated that anytime an atheist tries to conform to a moral code, they are reaching toward a higher, objective morality. This is simply not true. I can follow what I want, and someone else can follow whatever code they want. In the end, it doesn't matter. I'm going to live my life along my subjective moral code, and that's that. I do not claim to have more knowledge than anyone, and there in lies my whole point. We are finite creatures and our knowledge is limited. Who are we to allocate absolute anything?