I knew there was a reason I bought a Mac! 47 days of uptime is pretty impressive for any non-server system, let alone a laptop which often rattles around in my bag (when cycling), comes on holiday, stays "asleep" for a whole weekend, etc. etc.
And I guess that's the point really: the sleep function on Apple's laptops "just works". In this case I only had to reboot after 47 days for a system update. Of course, it's generally easy to avoid reboots on most *nix systems, but I'm yet to find a Linux desktop distro/hardware combination where the sleep function reliably works. If anyone out there would like to correct me, that would be most appreciated :)
Also, who can beat 47 days on a Macbook (or MB Pro)?