Adding a indicator / panel in unity panel

A possible alternative I found is to add a gnome panel to unity. You can experiment the solution by open a terminal and type

gnome-panel

I placed one single gnome panel at the bottom of the screen. In that panel you can place whatever you want as usual. It's also good for find resources, open windows and administrative tools (not immediate to find with unity interface).

If you like the solution you can autostart your new panel everytime you log in by adding an entry in: administration->session (or something similar, I haven't English locale set).

I hope this help

Neither Unity or Unity 2D will support applets, see here for more information:

• Can I use GNOME applets in Unity?
• What Application Indicators are available? has alternatives

Unity Lenses might be an option if you'd like to extend Unity.