In a startling turn (or April Fool's joke), The Tao of Mac is switching to Linux. I must say, though, I've been very heavily considering the same thing.
I use OS X like Linux most of the time anyway, I use fink heavily, no longer use many of the built-in tools (python and vim being prime examples) in favor of using more updated versions.
The switch won't gain me the things that Rui is hoping to get, I still work on a wide enough variety of platforms that I can't just rsync my pains away, but I've got enough portability tweaks worked into my environment right now that I won't be losing anything either. Also, I don't use any of the apps he complains about though I will miss Quicksilver until I can get LaunchBox to leave it in the dust.
The things I look forward to (see, something nice about something):
The only thing that is currently creating considerable worries in my mind is hardware support and power management. I have a Powerbook, it's my only computer and hasn't traditionally had the best supported Linux drivers and I really like being able to close my laptop and put it in my bag without worrying about whether or not it will suspend properly.