I did the backup and clean install thing. Runs like a champ on my Power Mac G5. I do think I'm going to upgrade the RAM to 2gb though.

I totally agree with Andy Ihnatko's analogy. Mail.App rocks.

The only issue I'm running into is when trying to install Adobe CS3 Design Premium from DVD, the installer for some reason thinks it needs two discs instead of one. This worked without issue in 10.4.x.