This extension is supposed to make a Unity-like launch bar appear in the Fedora 16 desktop. I installed it from the Fedora repositories, logged out, logged in, and it doesn't appear. gnome-tweak-tool doesn't even list it as installed:

The file listing for gnome-shell-extension-dock is:
/usr/share/glib-2.0/schemas/org.gnome.shell.extensions.dock.gschema.xml
/usr/share/gnome-shell/extensions/dock@gnome-shell-extensions.gnome.org
/usr/share/gnome-shell/extensions/dock@gnome-shell-extensions.gnome.org/extension.js
/usr/share/gnome-shell/extensions/dock@gnome-shell-extensions.gnome.org/metadata.json
/usr/share/gnome-shell/extensions/dock@gnome-shell-extensions.gnome.org/stylesheet.css