Version:            (using KDE KDE 3.4.1)
Installed from:    SuSE RPMs
OS:                Linux

It would be a great feature if events, appointments, todos and contacts, even notes could be linked together. A similar feature like Lotus Organizer(R) provides. 

E.g.: Creating an appointment, a contact could be linked to this entry. So when the appointment occurs, with a click on a special icon (maybe a anchor as in lotus organizer) or something else, all linked items (contact, note) would be displayed. So for an appointment a telephon number (from an contact) to call would appear. Or a note to this event and so on. 

As well this "linking feature" would be nice for contacts, too. With one click it would be able to find all appointments associated to this contact. Or find all the notes made for a contact, or an event, or an appointment....