Actually if you read around, the Constellation Project has been scuttled for review in 2015. In the 2010/2011 US Federal Budget, there were no funds allocated for the project - mainly because there seemed to be very little in terms of gains made and the project process lacked innovation across the entire board.
What I "do" know, is that the Orion capsules (that were already under construction), will be kept and integrated into some new design, but only to be used as emergency launch failure escape vehicles. I agree entirely with Obama and his administration (as does Buzz Aldrin), about the future of space travel needing more than a haircut and a shower to get it through.
One successful candidate for the ISS crew transportation vehicle provisional account is Sierra Nevada's Dream Chaser (a bit like a mini shuttle, and more or less a ferry to the international space station). Furthermore, Constellations whole concept was based on a return to specific utility.
The Space Shuttle program was so expensive due to the vehicle being so versatile, so Constellation was drafted to do the same work at a tenth of the cost, but I think they went too stingy on the design process, if you ask me.