Feature request: more extensive Sleep as Android integration

Have an added ability to set a goal to wake up at x or go to bed at y, to improve regularity of sleep.
An another option would be to have both of these as one goal: go to bed between a and b and wake up between x and y.

Let me know what you think and if you have anymore ideas for Sleep as Android integration, or better ways to use Beeminder to cultivate a healthy sleeping pattern.