traytop is an extension for GNOME Shell 3.4 that puts all your tray icons to the top panel, where they belong.
Download the extension:
git clone https://github.com/polof/traytop.git \
~/.local/share/gnome-shell/extensions/traytop@polof.github.com
Restart GNOME Shell (Alt+F2 and type 'r').
Open gnome-tweak-tool and enable the extension.
All new tray icons should now appear in the top panel. If you want to move existing tray icons there, restart GNOME Shell again.