I've done a quick search and can't find anything that mentions support for the latest Fedora version (currently 18). I'm running Fedora 15 which is end of life now. Will there be any support for 16-18 soon or should i plan to move everything to a new OS??
Fedora is not supported anymore as they changed their init system in a way that its not compatible with ispconfig. We might add support for fedora again in a future version. Fedora is the testbed from redhat for new developments, so its not optimal for servers anyway. If you search for a redhat based linux distribution for servers you might want to take a look at centos.