2. I don't like the current time selection lists very much. If you keep them, change the minute list to 5 minute intervals, most users won't need to set it to an exact minute and scrolling is reduced significantly. 3. If possible it would be great to have the N9 time dial (as in alarms) for time selection. I'd really like that :-).
4. Provide a Wifi in range event. I work at different times during the day and like to have silent when in Office Wifi and normal when I leave or go to lunch.
5. Its impractical to leave the app open all the time. Use the Harmattan "timed" (http://meego.gitorious.org/meego-middleware/timed/) to schedule events or write your own daemon (http://harmattan-dev.nokia.com/docs/...g_daemons.html).
6. Have a look at Nokia Situations (http://betalabs.nokia.com/apps/nokia-situations), plenty more ideas for you.