Ubuntu 11.04 Natty user with Kubuntu Desktop Environment now can install OS X-Lion style takeoff launcher to add to desktop as a full screen app launcher.

Use the commands in terminal to install takeoff from ppa:ferramroberto/nattyextra:

sudo add-apt-repository ppa:ferramroberto/nattyextra
sudo apt-get update
sudo apt-get install takeoff

After that, in right-click desktop menu select Add Widgets – > takeoff. In its settings window, set number of rows, number of columns:

Takeoff on kde-apps.org