How could object-oriented concepts and parallelism cohabit?

A lot of new languages and new concepts have been conceived in order to promote parallelism in the object-oriented framework. These proposals could be investigated using different concepts related to parallelism and object orientation. Among these concepts, we can find shared variables/message passing, inheritance/delegation, reflection. The degrees of a good cohabitation may be appreciated by combining the above concepts. In order to have significant criteria we have to determine how languages fit some requirements. These requirements should cover the different phases of programs development i.e. specification, design and implementation. To structure the discussion, we may focus on some formalisms and languages, in order to specify and to implement concurrent objects. The benefits of the different classes of these formalisms and languages should be discussed from a methodological point of view. The issues to be addressed in this context could include the following questions: what are the main characteristic design principles and methodologies of concurrent object-oriented programming? How could the current object-oriented methodologies handle concurrent and distributed objects?