As you've probably seen in
this thread, BobTheFish was planning to add joints support into orx but had to focus on his project due to time constraints.
Adding joints support shouldn't be a huge task, it's mainly a wrapper to write in the orxPhysics/orxBody modules (+ some wrapping functions in the orxObject one) and the actual implementation in the Box2D physics plugin.
With my newborn baby my freetime has really been cut down to a couple hours a week so I'll focus on the iPhone + SDL/OpenGL versions as it's really important for me for a close future.
However, if you feel like contributing by working on joints support, I'd be more than happy to help you with that! =)
If not, I'll add it to the todo list and will be back on it in a couple of months.
On a different topic, did you have the opportunity to try the object/clock binding? If so, did it work or did you encounter any trouble?