This video has a great angle shot from a helicopter of the latest launch test of the Grasshopper rocket. The Grasshopper is a verticle take off and landing testbed for what SpaceX hopes to eventually use for rocket stage recovery. The rockets would take off, and after separation, fall back to Earth, "fly" back to the landing pad, and land vertically. It's an ambitious project, but it is coming along nicely it seems.
The applications and knowledge learned for this project could also be applicable to a landing craft needed for landing people on Mars and taking off from Mars again for a return trip home.