I'd like to suggest that assignments with the anonymous grading option enabled should continue to hide/anonymize student names in SpeedGrader after posting an assignment's grades. The current behavior is that after posting grades the names become visible and there is no way to hide them again.
This is a problem for our instructors that grade anonymously. In order to prevent any grading biases from occurring throughout the semester, it would be beneficial to keep student names hidden in SpeedGrader no matter if the grades have been posted or not.
Our instructor community relies heavily on preserving anonymity throughout the course of the class. Automatically showing student names in SpeedGrader after posting grades makes that impossible to preserve.