For consistency in the user interface I would like to see the View\Expand All command expand all the discussion threads that are showing in my inbox.  At the moment I can only expand one discussion thread at a time making it a slow process to review my mail.  E.g. If multiple people reply to a message before I read my mail, all the responses are collapsed under the discussion thread and I have to manually track down my unread mail if I want to see then grouped by discussion thread.