It's here, oh joy! Oh rapture!
Installation is a doddle. Seriously. I've never met an installer as simple to use as this. Fifteen minutes or so for an "Archive & Install/Preserve users" installation.
Applications work after installation! Coo!
Minor hurdles: I had to make use of my emergency Firewire connection to the PC to install the Stuffit Expander, so that I could reinstall my third-party wireless NIC driver. Which, magically, remembered its registration info. Score!
I also had to upgrade GPGMail to the version that supports 10.4 (that's 1.1, folks).
Is it faster? Well, I think so. Safari definitely seems snappier.
I like the new Mail. Getting rid of the drawer with the folder list in it is a definite step forward.
I've got Jabber working in iChat, neener neener[0].
Dashboard is pretty, and nifty. How much I'll use it remains to be seen.