@Setanta,
"Worth doing" doesn't necessarily mean "expected to return a direct cash profit". Basic research, whose profits are indirect, uncertain, and long in coming, can be nevertheless be worth doing.
By your definition of "space", I don't see any money-making opportunities for private enterprise there. Private enterprise could produce all kinds of cool stuff in zero gravity, but it can set up those in fairly low orbits.
What I
am seeing in outer space is lots of interesting research exploring planets and moons to which we haven't sent probes yet. (The asteroid belt, Saturn and its moons). I'm sure those missions will produce interesting spinoffs, but the main benefit of exploring outer space will be the knowledge we gain, not the money we make.
Oh, and I agree that scientific progress will come from robo missions. Manned spacecraft are a waste of technology.