Ere, Tone007, you seem to know quite a bit about macs, if I could pick your brain for a minute with a quick question... 
What would be the best & quickest way to transfer my data from the G4 to the G5 when I get it, I was wondering if I could connect them up with a firewire cable and do it that way... 
Cheers
Franko
With a Mac it is simple... Boot the G4 in Target mode (with a firewire between them), and when you boot the install disk (on the new machine) select to transfer the accounts across. I have a brand new MacBook here where the user accounts are over 4 years old and originally set up on my old 12" PowerBook and have been transferred this way 5 times now!!!
In all seriousness, though should really think about an intel mac... the PPC ones are really long in the tooth now.