I am very pleased after playing around with Fedora 7 since it’s release. One of the most interesting tools I have run across that is available for Fedora 7 from the default repositories is revisor.
Revisor is a graphical frontend for livecd-tools and pungi. Livecd-tools allows for the creation of a live cd while pungi is responsible for making installable trees, and for creating CD and DVD isos.
This is an exciting tool that brings custom distro creation based on Fedora (and other similar distros) to a wider audience.