[whpalmer4]

To see all actions which have a due date set, go to context mode, group by due date, remaining actions, and close the group labeled "No due date". Save as a perspective for future use. Note that this will include actions which do not have a due date set explicitly but are contained in an action group or project which does. For example, if you've got a project called "File income tax return" which has a due date of 4/15/10, even if you don't assign the individual actions due dates, the program treats them as if they have a due date of 4/15/10, and they will be styled, sorted, and grouped accordingly.

If you need a list of only those actions which have their own due dates set (and in my experience, I'll be surprised if this truly turns out to be the case, and would enjoy hearing why) you probably need to either do some scripting or export your data to a spreadsheet and have a look there -- the export command will export the data explicitly set in each record/task, not the data inherited from or implied by the containing action group or project.