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.