Spins/What is a spin

This page is the draft to help to answer the question, 'What is a spin?' and related questions a user of the new Fedora Spins website might have.

* What is a custom spin?
* What makes up a spin?
* Can a custom spin be a LiveCD or an installable DVD?
* Why custom spins rather than Fedora out of the box?
* What kind of custom spins exist now?
* Spins are pretty cool, how do I create one?