It would be nice to auto-assign tags/categories to all messages in an Outlook folder that I create. This would allow me to drag-n-drop messages to a folder in order to apply tags. Additionally, it would allow me to use my mobile device email client (i.e. Windows Mobile, iPhone, Android, etc.) and keep my tags up-to-date by simply moving messages to the appropriate email folder on my phone and having Outlook automatically apply tags (auto-assign categories) once Outlook and my mobile phone syncs via Exchange.