That's very cool. I'm still on FC1 due to some kernel issues with my hardware, but I have been assured by the development team that it has been corrected. So now I am waiting for FC4 to be released next week (06/06/05). Once that happens, I'm upgrading.
I always try to stay one behind, I just went to three recently and will wait a few months before going to 4. But this is on my desktop. On my server I run RHEL..