You can still set it to boot at a certain time with OS X, and if you set up auto-login and have that as a login item, it'll accomplish the same task.
Thanks for the tip.
On a tengential note: Is it possible to turn on the screen backlight programmatically?
Since OS X 10.6.3, the backlight remains off when waking up from hibernation (this is documented in [1]). The proposed solution is to delete the related plist, which resets the hibernate mode to the default settings that are useless for me. My current solution is to close back the lid for a split second in order to trigger the hibernation process, then to fiddle with the arrow keys to abort it. I'd prefer something more elegant.
1. https://discussions.apple.com/thread/2384628?start=90&ts...
Battery Power Adapter
Computer sleep: 10 min 45 min
Display sleep: 2 min 3 min
Put HD to sleep: Yes Yes
Wake up from LAN: Yes Yes
Dim before sleep: Yes Yes
Boot after power failure: No