Add our own formattings transformation handler (i.e. when pasting, always use <strong>, never use <b>)

When you copy/paste a piece of HTML (or a Word doc), all bolded content — even those using <strong> tags — uses <b> tags. We would like to never use <b>, and always use <strong>. Is it possible to define a content handler that runs before all others that takes care of this?

Asked at https://getsatisfaction.com/aloha_editor/topics/content_handler_to_conve....