Appointment Notifications in Other's Calendars

My company recently started using Exchange 2007 along with Outlook 2007. We
are an IT company who provides a lot of on-site service. We have one person
who schedules 90% of the appointments for the company. We used to schedule
the appointment in their calendar and send out meeting invitations to the
rest of the company. This creates a lot of clutter and with Exchange 2007 we
were hoping to make it so that each employee only had appointments they were
attending in their personal calendars.

We have all of our personal calendars shared with most employees having
Reviewer permissions and the ones who schedule having Editor permissions. If
we want to schedule an appointment in a single employee's calendar we can
easily open their calendar and create the appointment. The problem is this
process will quickly become a problem causing employees not to know about
upcoming appointments, much less appointment changes/cancellations.

Is there a way that we can create an appointment inside a shared personal
calendar in Outlook 2007 and the person who's calendar it is they will be
notified of this appointment? We have tried a few tests but they were
inconsistent. We tried inviting the employee to the appointment in their own
calendar and some people get a notification and some have that notification
sent directly to their Deleted Items.

Is there a setting we're missing or are we chasing an impossible goal?

Thanks for your time. Any help/comments is much appreciated.