18:17 up 120 days, 21 mins, 3 users, load averages: 1.24 1.37 1.27
Dual 1.0GHz Quicksilver, 512MB RAM, 10.3.3 (because I haven't shut it down to install 10.3.4).
This is my work machine, and includes a D2OL distributed client running the whole time, between 5 and 20 apps open depending on what I'm doing, and a whole lot of network activity (all backups go to my machine, and I connect to it from other Windows boxes and Macs here occasionally).
Being able to turn off the Ethernet port without shutting down is nice, since it's let me reset the network connection when the campus network flakes out and confuses the router, which is frequently.
I'm not actually an uptime junky; I tend to shut my home computer down much more frequently, but I thought I'd see how stable one of the Macs I maintain in a real work environment actually is. Depending on what's updated, I suppose I'll probably install 10.3.5 when that is released.
We also get huge uptimes on Windows machines here, but only ones that are used as dedicated test stations.