If you are looking for a tool to bundle the appointments of selected outlook calendar users into one or more interactive public folder calendars, take a look at www.ExchangeGroupCalendar.com
It works with OWA, Entourage, BES and so on. Available for both 32 as 64-bit Exchange server versions.
It can also be used as central scheduling location to create/edit/delete items in the personal calendars of team members.