In the last 2 hours I experienced a computer religious experience. I opened the box for my new G4 laptop, connected a firewire cable from it to my old laptop, and then watched in awe as the entire content, applications, and set up were transferred over. It was 100% smooth (so far).
Details on how to do this I found at Mac OS X 10.3: Transferring data with Setup Assistant frequently asked questions (FAQ).
I have never had an upgrade experience like that. I am a bit shaky, disoriented, hearing music, and seeing bright light… swimming towards it… cannot … type… any .. m………….