at home. Still running a Starmax 604E 160 with a 233 Sonnet. Haven't tried to upgrade it yet. I have a G4 at work, and man, OSX.1 is definately worth the look. I have been using it (OS X) since early this year (including beta) and it's become my primary machine in the office (I also have a Sparc 1000, RH 7.2 Intel box, Win 2k and Win XP...) I haven't been this excited about an OS since I first installed Debian some years back... What can I say? I've always been kinda partial to Macs, but I'm not a paid shill.
Let me know if you take the plunge on your Motorola, 'cause I'm just about ready to try on my home machine.