One of the advantages of being a Fedora Core mirror is that we get early access to the releases. We have to have them before the launch date so people will be able to get them from us. Fedora Core 4 launches on Monday but we have it today. I just installed it on a machine in our lab (network installs rock!), and it's pretty! The install has rounded buttons now and the progress bar is textured. Ooooh! That's about all I've seen so far.