If you are running Ubuntu Feisty Fawn 7.04, you can install AWN and Affinity from an Ubuntu repository.

First, edit your apt sources: gksudo gedit /etc/apt/sources.list

Add these lines to the bottom:

## Avant Window Navigator
deb http://download.tuxfamily.org/syzygy42/ feisty avant-window-navigator
deb-src http://download.tuxfamily.org/syzygy42/ feisty avant-window-navigator

Then do this in a terminal:

wget http://download.tuxfamily.org/syzygy42/8434D43A.gpg -O- | sudo apt-key add -
sudo apt-get update
sudo apt-get upgrade

Now to install the stable AWN version do

NOTICE: No stable AWN at this time. It will be added at the next release

For AWN BZR do:

sudo apt-get install avant-window-navigator-bzr

You can install more applets for AWN by doing:

sudo apt-get install awn-core-applets-bzr

The Affinity in this repo requires Tracker to work properly:

sudo apt-get install tracker

For the stable Affinity version do

sudo apt-get install affinity

Or for Affinity SVN do:

sudo apt-get install affinity-svn

Post any questions about this repo in this thread on the Ubuntu Forums: http://ubuntuforums.org/showthread.php?t=385981