After making a backup, I upgraded one of my computers to Fedora 7. The upgrade went smoothly, and I haven’t noticed any problems.  The balloon theme is nicer that then Fedora Core 6 DNA theme..
GutenPrint 5.0 (formerly GimpPrint) has better support for my Epson Stylus R300 inkjet printer.
I’ll probably upgrade my laptop soon, but I don’t plan to upgrade my servers for a few months.