My wife uses a Powerbook G4 1.67Ghz (10.5.

daily as her main computer. Facebook, emails, syncing ipod and iphone etc...
I have (hardly use it) a Powermac G4 (Digital audio) with sonnet 1Ghz upgradewith Morphos and Leopard installed.
Also for nostalgia sake have a slot loading iMac G3 (Blue) and an iBook G3 (Blue).