Computers:
I finally got around to loading Apple's Mac OS X 10.3 (aka: Panther) on my wife's G4 laptop and on my "new" Dual G4/500. Fast-User Switching is the most awesomely useful new feature, it allows you to quickly re-login to a host as a new user while leaving the original user still logged in and doing whatever they were doing. To switch back, all you need is the appropriate password. It makes sharing a single machine (like the laptop in our family room) really easy. It is the feature I most wanted when I first started playing with multiple users in Mac OS 9 and on my SGI O2. Very cool. Not sure I like the visual changes to the Finder yet, but I can either theme them away or get used to them, the utility of Fast-User Switching is worth the changes to Finder.