Mac OS X Server: Setting up iCal Server
Mac OS X Server’s iCal Server was introduced in Leopard Server as a centralized solution for scheduling meetings, events and resources. With Snow Leopard, group and shared calendars were introduced, along with push notification of event updates and the ability to coordinate events with external users.
If you are looking for a calendaring solution for your business or company and don’t want to be locked into proprietary solutions from Microsoft, Novell or other companies, iCal is based on open standards, so you can assured that iCal will work with many other applications and across platforms.