But they would have to be INTELLIGENT ping-pong balls! :D (I think that describes every one I've ever tried to play with, because they always manage to avoid getting hit by me. But anyway... )
One thing I haven't seen come up on either side of this is the question of time. The universe we know is subject to a linear time frame. But if it had a beginning, then that suggest there's something or somebody or whatever that is outside of time. Saying that God or anything else is "eternal" assumes that time is a universal. I'm not sure that's the case. So if time is something that appeared with the appearance of this universe, then whatever is outside of it could, and probably would, be subject to a whole different set of "rules." Synnen, what are your thoughts on that?