http://www.space.com/12489-nasa-mars...spaceship-red-
dragon.html

A daring mission where NASA will try to land SpaceX's Dragon on Mars
using its emergency escape system rocket engines. The Red Dragon will
carry more scientific gear to Mars than ALL PREVIOUS MISSIONS COMBINED.
If SpaceX pulls this off then they'll finally be able to shut up Boeing
and LockMart once and for all who keep shouting 'We put a man on the
Moon!'

I'd like to suggest another variant where a SECOND Red Dragon capsule
lands next to the first one. This to practice pin-point landings. In
addition the second Red Dragon would be chockful of fuel which would be
transferred to the first Dragon somehow. The first Red Dragon would
then lift-off and try to attain orbit, validating a possible manned
mission or making sample return with some serious cargo possible.