Everytime, I go to the stream screen, I have the strong feeling of something missing, and that is a "To-Do today" (or "daily review", "Today" etc.) section right on top of it. This would be best solved by putting all To-Do's together on top of the stream, that have their Due-date today and by that seperating those To-Do's from the rest so one yould see right at a glance which tasks are important today. It would look really nice if that section would look like a post-it label!