Tronny is Gnome Shell theme by rvc-2011 based on original Tron Legacy theme by half-left. Tronny is fully compatible with Gnome 3.2 so you can get it working under latest Ubuntu 11.10.
- Backup /usr/share/gnome-shell/theme folder
- Extract the archive and rename gnome-shell to theme
- Copy this folder to /usr/share/gnome-shell/
- Restart Gnome Shell by hitting Alt+F2, then type r and press enter
- You can also use Gnome Tweak Tool to install directly from the archive