In the Planned smartlist, there’s a section called ‘Tomorrow’ where you can view your tasks due tomorrow.
We have the All, Assigned to you, Important, Completed and Planned smartlists.
Within the Planned smartlist you can have Today, Tomorrow, Weekly and Later subsections.
We do support showing due tasks in the calendar (Agenda view) in the OWA My Day pane.
We are working on extending this functionality.