iCal Invitations

If someone sends you an iCal attachment in an email when you view the message you will be presented with a toolbar that will look like this:

When you click on the Accept of Decline invitation buttons you will be prompted by a window asking for you to decide how you want to respond to the event organizer.

If you choose to Send the response now a message saying you have accepted the appointment is sent to the meeting planner.  If you choose to Edit the response before sending a compose window will be opened with the opportunity for you to write a personalized message explaining why you are or are not attending.  If you choose Don't send a response or click Cancel in the dialog no message will be sent to the meeting planner.