Originally Posted by jkemper
[...]I am real nervous about updating from fc6 to fc7 because I don't want to mess anything up.[...]
Since you're running a group server, you always have a current full backup set from which you can always restore you old system.
So the only mess you could make would be the down-time to restore the system from the backups. So schedule the system upgrade for a time when the rest of your group is not working.
But, really, if you're concerned about stability, Fedora is probably not your best choice. (It has always been a cutting-edge distribution and beta-test platform for Red Hat.) If I were you, I'd "bite the bullet" and switch to John's suggestion of CentOS (which is quite similar to older Fedora releases) or, if you would like a system with actual support (for a fee, of course), consider moving to RHEL. Red Hat would be quite happy to take your money and help you through the conversion.
And an "upgrade" to FC7 from FC6 is just moving from an three year old, unsupported, distribution to an unsupported 2 1/2 year old distribution. What's the point in that?