Anyone have a quick way, accessible from Quicksilver, to force your mac to hibernate?
You can use Deep Sleep. It's a Dashboard widget that will put your mac into hibernation mode.
Edit: from the website
From there, you can check out if QuickSilver can launch command line programs.
Careful, be aware there's 2 sleep mode.
The normal one you can trigger using ⌥+⌘+Eject
And the hibernate (or Safe Sleep) mode.
You can read about the differences between them here.