Fedora Core 2
I'm performing the task of "apt-get dist-upgrade"ing to Fedora Core 2 as we speak. The biggest reason is that I can't get the latest development 2.6.5/2.6.6 kernels to boot on my system. It's freezing right after the "freeing kernel memory" line (trying to find /sbin/init, I assume).
I've found a thread on Google Groups potentially related to this issue, but I haven't tried out the patch mentioned.