Upgrade Path?

I've decided to upgrade the machine running this and several other sites when OS X 10.3 comes out later this month. The 400 Mhz G4 Ti Book that runs this site currently runs 10.2 server, setup with the idea of creating a netinfo hierarchy and common user data base throughout the operation. I've come to the decision that for just a few users it's easier to setup the same users on each machine, changing userid's if necessary to get things in sync.

This raises the question - what is the best way to upgrade from 10.2 Server to 10.3 (non-Server)?