After a day on Fedora Core 4, test 1, I've had my fill. I performed a "complete" install from the DVD on my Lifebook and that all went quite well. Complete seems to take about 7 GB of space :-)
Things seemed to be going OK at first, then I notices that my fans were screaming and when I checked top I saw that the CPU was pegged by gdm and syslog. A reboot didn't cure this ill so, with Johnny's help, I turned it off and dropped back to a console boot and manually starting X.
Once I got up again, my fans started screaming again and checking top, I saw some other process chewing up CPU. I forgot what it was, something about linking (and I wasn't compiling or anything like that). Not interested in tracking that down, I just bailed :-)
I'm hoping that these issues were unique to my install or laptop but I'm happy falling back to FC3 and I'll be patiently awaiting FC4 test 2.