We have deployed two new API methods.  Groups_Rename allows you to change the name of an Email Group (aka Email List).  And TransactionalGroups_Rename allows you to change the name of a Transactional Email Group.
                 Groups_Rename                                                   
Renames a group. Returns a String.                                  TransactionalGroups_Rename                                                   
Renames a transactional group. Returns a String.                                Both of these methods were the request of a client.