How to install GNOME-Do on Linux

I've just discovered the sweetest program launcher for GNOME. It works just like Launchy on windows and looks somewhat similar to the awesome Quicksilver on the Macs.

Here's how to install it.
Installing GNOME Do on Ubuntu 7.10 Gutsy
1. Open your /etc/apt/sources.list file with gedit text editor:
$ sudo gedit /etc/apt/sources.list

2. Add the following lines to your /etc/apt/sources.list file:
deb http://ppa.launchpad.net/rharding/ubuntu gutsy main
deb-src http://ppa.launchpad.net/rharding/ubuntu gutsy main

3. After save file, run this command:
$ sudo apt-get update

4. Install GNOME Do, execute the following command:
$ sudo apt-get install gnome-do

5. To run GNOME Do, hit Alt + F2 to Run Command and type:
gnome-do

The hotkey to activate Gnome Do is (hate to say this) Windows + Space