It is on the list. For now, you can approximate that by using the Upcoming Events item in the Search pane. By default, it shows the next week's events, ordered by date, in the Search Results pane. You can tweak it to show the next month by changing the date in the first row of the search grid to Begin Date less than 10/23/2006 (one month from now; the dates are stored relative so the search will always show the next month's events). Not as pretty as a calendar but functional.
Docking the calendar pane may also be helpful to visualize the various dates of events.
http://www.kinook.com/UR/Manual/calendardialog.htm
You can also customize the search as desired (for instance, limit the search to appointment items, sort by flag or priority within each day, add/remove columns to the results pane, etc.) or create various views by creating different customized search items. Search items can also be organized in the Data Explorer (they don't have to be in the Search pane).
http://www.kinook.com/UR/Manual/columns.htm
http://www.kinook.com/UR/Manual/advancedsearch.htm