Customized and derived distributions

One of the goals of the recent Fedora releases (first 7, now 8), has been to enable the
creation of custom "spins" of the distribution but still let the spins rely on upstream Fedora
for most package updates.

In the past, once you forked a distribution, you then had to do a lot of work yourself to keep
it up to date and basically once forked, most derived distros slowly went their own way.

This new spins concept in Fedora allows somebody who has a narrow focus to direct their energy
on those packages of interest to them rather than having to take over maintenance of an entire
distro. So, for example, "Mythdora" spin can focus on making really good 'mythtv' packages,
and not worry so much about kernel updates.