This is an update and partial retraction of my entry of 10-09-2009: Tools>Serial Port is still greyed out...unless you are executing the binary as root. I had forgotten to exit from my "su" session (required to get arduino-0017 into /usr/local/bin). Latest status is Tools->Serial Port (and upload capability) are currently accessible only to root in Fedora 11. Now, if I could figure out how to extend root privileges to my user account when accessing this application...