An omnipotent god could create a universe in which determinism and free will coexist.
Could, but then what kind of God do we end up with? If God is truly omniscient and has a personal plan just for you, then what does that say about the personal plan created for a man who dies in an automobile accident? Did God see a need for this man to die in a horrible accident? How about the infant that dies of SIDS? Does God meddle in the lives of some and then allow all others to just make their own choices or have the course of our lives changed by pure chance?
After reading all of the posts in this thread it is clear to me that if there is a God, then that God simply set the clock in motion and has no control over what is actually going to happen. i.e., a truly compassionate, loving, personal God cannot be omniscient and allow man to die in truly awful ways unless he has no control over how things are going to work out.
Cheers,
--Caldron68