It really depends a bit on the bit you broke.
Personal experience includes collar bones -3, coracoclavicular ligament avulsion, GT of humerus and split spine of scapula. If the injury could be worsened by riding, then you can't do it, but if you are lucky, riding may not hurt more than not riding.
Longest time off any bike for all the above was 3 weeks. The clavicles were the worst for riding in the early stages (while clicking). Somehow the forward brace riding position does not seem to put that much strain on the shoulders.
The series of exercises listed above was very good.
Good luck and "riding" after injury does not mean balls to the wall.