Start. How To Re-Enable The Notification Area (Systray) In Ubuntu 11.04, For All Applications. Unity got its notification area (called Systray by the Ubuntu developers) back a while ago, but only for a few applications: Java apps, Mumble, Wine applications, Skype, and hp-systray.
But there's an easy way to either re-enable the Systray for all applications or to whitelist a few applications you can't live without. Read on to learn how to get your systray back! ~/Blog: Whitelist - A utility script to allow apps to use the Unity System Tray. Ubuntu Natty will enforce a whitelist which will effectively disallow applications that normally use the notification area from displaying icons in your panel.
This change is simply an attempt to open source software developers to redesign their applications to fit into the vision of how software should be designed rather than how the rest of the community designs software. Under this restriction, Jupiter will no longer work starting with Ubuntu Natty because I do not believe Jupiter needs to be rewritten to fit the Ubuntu mold when it already works fine for all other distributions in which it is supported and used. That said however, I have installed Natty for the purpose of building a simple utility to whitelist ANY notification area icon .. I call it simply "whitelist".