Yesterday I got a Philips Wake-Up Light.. I set it so that the light started coming on at 8 a.m., and birds started chirping at 8:30. My regular alarm was set to go off at 8:45. I then proceeded to work half the night. I sent out important work email at 2:30 AM, then tried to get to sleep. It was probably 3:30 or so before I actually nodded off.
This morning at 8:30, I woke to birds chirping. I was actually wide awake, with no desire to hit the snooze button or go back to sleep.
One night is a small sample, but I'm optimistic.