re: 2016?
Are they still planning to de-orbit the station in 2016?
Where did you read it? Because it is an international project, all the other partners will need to agree about that and there certainly is no such agreement, so far.
It would be foolish from the US not to allow Orion to dock with ISS.
But now, in 2007, there are no plans to build a docking device for Orion on the ISS.