If you create  the Meeting Workspace through SharePoint, it won't know about
any parent sites that may have an Events list and can't add an entry within
it. However, new items in Events lists give you the option of creating a
Meeting Workspace, so you only get the best of both worlds through this
method. You can then link this Events list into an Outlook Calendar.

However, I do not think I've described the
problem accurately. The problem is that I would like to be able to use
Outlook 2003 to create  a meeting that appears both on the attendees
calendars (meeting planner) and in the events list on the Sharepoint
site to which it relates.

The alternative would be a method of doing a meeting in Sharepoint that
sent an email to all attendees similar to the Meeting Planner function
in Outlook.

Either way I would think that it would require an entry in the GAL for
the SPS event object.

Well, you can do half. When you create  a Meeting Request in Outlook, and
choose to also create a Meeting Workspace, any attendees you add *will* get
a standard accept meeting request e-mail, and it will be added to their
Outlook calendar. The workspace is created underneath the site that you
specify, but Outlook does not add an entry into an Events list on that site.

Otherwise, if you use SharePoint to add an entry in an Events list, and
choose to create a Meeting Workspace to go along with it, there is also a
step here as well where you can choose attendees from your address book who
will get an accept meeting request e-mail.

Either way, the meeting requestor and attendees will have the event in their
Outlook calendar, but only the second method creates an entry in an Event
List that points to the created Meeting Workspace. The workaround for the
first method is, after you create the event and Meeting Workspace in
Outlook, go back to the Events List and add a new one manually, choosing to
create a Meeting Workspace. The next page allows you to bypass the
workspace creation by linking to an *existing one*, which handily appears in
a drop-down list. So you can link the event to the workspace you created in
Outlook!