Another inteersting idea is an orbital ring - basically a rotating cable around Earth in LEO, which is accelerated by a maglev-train-like platform. The platform travels "along" the ring at high speed, but it can be made to stay "at one place" from Earth surface perspective (i.e. geostationary). The cable ring is rotated at orbiting velocity (or higher), so the centrifugal force counteracts gravity, keeping it in place.
