ok folks lets keep the tone down please, I don't want this turning into a argument just because someone asked a legitimate question... on that note I have to agree with some folks here that using an alarm clock is not doable on a $1000+ device is pretty bad, there is $75 dollar devices that can do this with no problems, MS should have a way to enable alarm programs to wake the device out of hibernate and ring to wake the person at the intended time..
Just because you spend a lot of money on something doesn't mean it should do everything. My car can't mow the lawn either.
It's a computer, not an alarm clock, I'm not sure why that surprises people.