I am coming off of a nearly three year stint with a Voyager and have now upgraded to a Droid. One of the features I liked about the Voyager was the calendar alerts function - when you had an appointment reminder on vibrate mode, the phone would vibrate until acknowledged. While I do like the Droid's subtlety on some levels, when I need to be reminded of something this does not help. Is there a calendar app out there (free or paid) that has a better system of alerts, or is there a way to tell my phone to do more than quietly buzz twice?