Fedora - who uses it?
 

I have to admit that I don't know anyone who runs Fedora or anyone who has ever used it.
Is it one of the more difficult distro's to set up and run, is this the reason why it is not as popular as others?

Fedora is a fast pace development distribution of Linux. The life cycle for Fedora is 1 year. Then it goes into Fedora Legacy which will give you another year of updates. Fedora's short Life span makes its production server use very limited. If your looking for a nice server distro have a look at Centos. Full updates to Centos 4 are scheduled to Feb 29, 2008. And Maintenance Updates are scheduled from Mar 1, 2008 to Feb 29, 2012. So its going to be supported for a very long time.

I use Fedora Core 4 on my colocated server. It wasn't that difficult to setup and configure, it actually should be easier then most distros since it has a ton of packages included for you during installation even when only installing as a server (no GUI). As Soulwatcher mentioned, the life cycle is fairly short. With FC5 right around the corner I'm going to have to do something with my server in the next year.

I use Fedora Core 1 - it's just right for me - easy to set up and maintain (YUM :D)

For those who don't know Fedora Core 5 is now out.
http://fedora.redhat.com

I use Fedora Core 4 on my server also and I like it because it was easy to setup with the step by step setup.