VF-200 200kW VASIMIR flight demonstrator to be tested on the ISS
Article dated 10MAR2011
http://www.theregister.co.uk/2011/03/10/ad_astra_nasa_vf200_announcement/
http://www.adastrarocket.com/aarc/VF200
http://news.yahoo.com/nasa-test-vf-200-vasimr-plasma-rocket-iss-20110310-155100-110.html
http://forum.nasaspaceflight.com/index.php?topic=18382.465
Delivery time to the ISS? I haven’t found one yet.
It looks like the power needed to get to Mars will require a nuclear power plant.