We have found that the group calendar function within Notes is not very user-friendly (our users couldn't understand the concept of everyone giving calendar access to their colleagues and then individually creating a group calendar in their own mail database). We have bought a group calendar software (we opted for OctoSchedule, but there are several good products on the market which might be suited better to your needs, as OctoSchedule is too highly priced for only 9 users). So now the users only take care of their individual calendars, an agent that runs every hour picks up all the entries from the user's calendars and writes them into the group calendar database. Everyone has Reader Access to this database and can see the scheduling of the colleagues.