What we haven't covered
The following techniques may be worth adding to this tutorial:
o i18n - how to properly internationalise your templates (especially after Sebastien has patched RichDocument to fix i18n support)
o More details on using IConstrainTypes to restrict addable types to a folder
o Writing custom widgets - what was involved in writing the ImagesManagerWidget and AttachmentsManagerWidget widgets, including:
o Registering new form controller actions on atct_edit
