BOB SHARE

Kiba dock and AWN are two of my favorite dock that resembles MAC dock.
You can try them from
http://www.kiba-dock.org/
https://launchpad.net/awn

Here is a tutorial to setup kiba-dock in Ubuntu
http://ubuntuforums.org/showthread.php?t=268645

Here is a tutorial to setup awn
http://wiki.awn-project.org/Installation

While Kiba dock focuses on launchers, AWN supports both launchers and task list.I just wanted the launcher and tried to remove the task list from it but I could only seperate, not remove. While checking the blueprint I was happy to know that in future version one of them can be removed.

While both of the provide you with fancy desktop, they requires composite( like copiz fusion) to be enabled. So be aware if you have some old system.

Here is mine desktop with AWN.



BTW AWN stands for Avant Window Navigator.