I am going to an iPod touch from a Palm Pilot. On my Palm I could set a to do with a sound alarm that would alert me before the event...ie a doctors appointment with an alarm 20 minutes prior to tell me to leave now. It looks like I should be able to do this with iCal with sound alert but I can't seem to get it to work. I ask for an alarm, the ipod goes to sleep in my pocket and the time passes without me ever being alerted. Is there something i must do differently? Does this sound alarm work on the iPod touch?