The point that Linux enthusiasts become Linux realists is when they realize they are afraid to put their laptop to sleep by closing the lid.
EDIT: With Ubuntu 8.10
Lot of build up for the pain body, bro.
But keep telling yourself that Windows is the future; it's part of my competitive advantage ;-)
I hit the power button, choose suspend or hibernate.
Later I hit the keyboard to resume, enter my screensaver password, and resume work.
Edit: I play music and download files with the lid closed. So I don't want my computer to turn off when I do that. And OS X uses screensaver when resuming too - I own one.
I love my Mac.
I'm not sure I could switch back; I'm more likely to switch to Windows than Linux again, just for the international support.