frodo, I think you are correct in defining free will as a biological mechanism. I just don't believe that God is the so called giver of this free will. Iatia, I am not sure I understand your question but allow me to take a crack at it. First off let me state my position, I don't believe in the existence of God nor that the universe itself was intelligently designed by some uncaused cause who in this case we will call the Christian God. If you state that everything that exists has a cause for its existence then to state that God is not subject to these rules would be nothing more than special pleading. Therefore my answer to the first part of your question is that God is not an uncaused cause. Regarding free will I have sided with frodo and his definition of it and don't see the correlation between the first part of your question and the second half.
There is nothing people will not maintain when they are slaves to superstition
http://chatpilot-godisamyth.blogspot.com/
http://chatpilot-godisamyth.blogspot.com/