Wow, never read the rest of the thread.. (pretty interesting..)
I did not seriously start contemplating free will and determinism until after I became an atheist. The thoughts were daunting at first. I quickly came to the conclusion that I was a hard determinist and that the thought of free will existing at any level was ludicrous. This thinking had/has very horrendous consequences.
It's not only that you're not in control of your emotions, it's also that you're not even in control of your own thoughts and words. What is coming out of your mouth is coming from your brain, and they thus lose all personal meaning. You are therefore reduced to mere awareness, with the ability to experience stimuli. The worst part of you is that everyone around you is in the same predicament as you are. The love you feel from your mother or wife, comes not from them but predetermined processes in the brain. Everything suddenly turns cold.
It's no longer that you don't have free will, it's that you're not even a unique being anymore, you're just mere awareness. Everything else is robotic. Which makes the question of what are we more interesting, and perhaps a little more clear. Are we interchangable with any brain? What separates us from one another? Do we all come from the same metaphysical source?
These are my thoughts at least, maybe I'm totally of base. I haven't really entertained the thought of free will and determinism since becoming an atheist, but this thread has reopened an interest in the subject.