We made a loud and long alarm possible with an app called Calendar Alarm, now available in the app store. The alarm syncs with the standard Calendar and other calendars supported by the iPhone/iPod. There are 12 sounds to choose between and the sounds rings for 10 or 30 seconds. In the upcoming version (september2010) a repeat/sleep will be added. App store link http://itunes.apple.com/app/calendar-alarm/id367803799