I see some definite possibilities for this. Any chance of adding shutdown or
restarts, maybe sleep and wakeups, to the schedule capabilities?

I manage the Macintosh labs in the College of Arts and Humanities at Eastern
Illinois University. Typically, I leave the machines on all the time due to
OSX's built in UNIX "cleanup" features that are set to go off in the wee
hours of the morning. It would be nice to be able to schedule a shut down
for some point after the labs close, then start them up a few minutes before
the UNIX stuff wants to run, let that happen, then let stuff like Norton
Live Update run, then shut down when everything is finished. This would then give the students a nice clean machine to start the day.