SpaceX, also known as Space Exploration Technologies, will get $1.6 billion to move at least 20 tons of cargo on twelve trips using its Falcon 9 launch vehicle and the Dragon spacecraft. The Falcon 9 is a two stage liquid oxygen and kerosene powered rocket designed primarily for reliability. The Dragon spacecraft is designed to haul both pressurized and unpressurized cargo and is also capable of returning cargo to Earth. It can also carry up to seven people if cargo is omitted.
SpaceX will spend much of 2009 testing the combination of the Falcon 9 launch vehicle and the Dragon spacecraft, culminating in a test run to the ISS in 2010 complete with a full docking. Orbital Sciences also plans a test run to the ISS in late 2010.