I have put together a basic Cinnamon Live spin, and was wondering if this is something people would like to see become official. It's not ready for submission quite yet, there is a bit of a hack to change the default gtk-theme to Zukitwo, as the Adwaita gtk-theme messes up title-bar and desktop icon colors (something that should probably be fixed upstream, this happens for any Cinnamon install by default in F21). I'm not a Fedora packager nor do I have a whole lot of time to put into this, but I am willing to update and maintain the spin as necessary.
I have the kickstart files in this github repo:
And resulting images, which I have briefly tested and installed in a VM:
I added a skeleton wiki page as well: