Using the new Joose bridge you can use Joose to build PureMVC applications. You can use Joose's facilities to inherit from the PureMVC base classes and apply Joose-roles to all instances and classes included in PureMVC. The code works on the sample application. There seems to be no test suite in the main repository, so it cant be fully verified.
You can download the code from the Joose repository. Just replace the file objs.js from the PureMVC download with the file from Joose and you are good to go.
The code was only minimally tested but seems to work. If there is further interest or as soon as I have a work project that uses the framework I'll invest further time in it.