iCal alarm clock

I just found a pseudo-obvious but still neat way to turn iCal (the calendar app for mac) into an alarm clock...

For you iCal users-

Make a new event (or even a new calendar for "alarms")

Set the start time of the event to the time that you want to wake up + 15 minutes.

Under the "alarm" tab, select 'open file' '15 minutes before'

Choose an mp3

voila! Music in the morning.