Who's Building It: Lockheed Martin, makers of the SR-71 Blackbird
Key Features: All-glass cockpit derived from Boeing 787, auto-docking, advanced computers
Powerplant: Service Module--Aerojet AJ10 based on Delta 2 Rocket
Capability: Intially--Low Earth Orbit for Space Station rendezvous. Later--Moon, Near Earth Objects, Mars
Capacity: Four or Six astronauts, plus cargo
System It Replaces: Space Shuttle to ISS, Apollo Command Module for Lunar missions
Due Date: 2012 unmanned to Earth Orbit, 2014 manned, 2019 Moon mission

Orion's much less "glamorous" than the amazing X33, which was originally slated to fill the same duties. But it develops on key ideas from the Apollo era, and so it should be a relatively simple and reliable vehicle. Mated to different rocket-powered Service Modules, Orion will go the ISS, or the Moon and perhaps even Mars.