Among the Fedora 17 codename suggestions are Erwin, Hugo, Shakespeare, Ramon, Morgan, Alcatraz, Balboa, Koch, and Coral. Codename suggestions just began this morning. Surprisingly, Bacon hasn't been proposed as a Fedora 17 codename, which is usually proposed frequently as the codename for this Red Hat sponsored operating system.
Here's some of the recent Fedora codenames:
Fedora 16 - Verne
Fedora 15 - Lovelock
Fedora 14 - Laughlin
Fedora 13 - Goddard
Fedora 12 - Constantine
Fedora 11 - Leonidas
Current codename suggestions for Fedora 17 can be found on the Fedora Wiki.