Ubuntu 10.04 will bring panel overhaul, social network menu
Canonical has revealed plans to bring social networking integration and GNOME panel improvements in the next major version of Ubuntu. Notification area icons will be replaced by a new application indicator system. The panel will also feature a new Me Menu for setting messaging status.
Canonical has lifted the curtains on some ambitious plans to reinvent the GNOME panel. The changes, which could potentially debut in the next major version of Ubuntu, will help simplify the desktop user experience and clean up superfluous panel clutter. Although the proposed changes look very promising, getting third-party application developers to integrate with the new panel functionality could prove challenging.
Techpiyush's Blog 
ubuntu is very promising. I am one satisfied user .