The latest beta for Fedora is out - 19. Since I have a fairly clean install of Fedora 18 from a Memorial Day weekend laptop rebuild, I figured I'd be bold and just start off with the latest beta. So here goes:
yum install fedup
fedup --network 19 --instrepo http://alt.fedoraproject.org/pub/fedora/linux/development/19/x86_64/os/
Let's see how far we get...