for 12. basically in your calendar, you would have a meeting, say "2pm, meeting with the Jetsons, lasts till 3pm".
So during that time, the phone knows you are busy, in a meeting. So it selects silent (no ringtones, only vibrate) during that time.
i thought it was a cool feature, saves me from constantly checking my phone to make sure its on silent.
for 10. say i'm roaming aboard, it would be nice if i could goto contact select "booty call" and change the first bit of the number BEFORE it dials , instead of it immediately dialing the number.
ohh 15. Contacts are LOCALLY stored, so that when i need to find a number in a hurry it will be there, i wont have to stare at "loading"....