I was also expecting that maybe we'd lick anti-gravity by now, but apparently not.
As far as I'm aware creating gravity is a theoretical impossibility. Centripetal, or Centrifugal(don't want to start that discussion) force is not gravity. Unless Graviton particles go from theory to reality, and we learn how to manufacture gravitational effects with them, I don't think anti gravity as it's portrayed in sci-fi is even possible.
If someone knows better though feel free to correct me.