Launch Empathy & Gwibber from user menu. Inspired from Unity's messaging menu. I must admit that I'm no developer. Just know some basics of coding. This extension was made by modifying the code of "Advanced Settings in UserMenu" extension. If you face any problem feel free to report it, although I can't promise that I'll be able to fix it.
Note: Binary files aren't shown on the web site. To see all files, please download the extension zipfile.
Looks fine.
Empathy & Gwibber in UserMenu