Did the following...

cd ~/
modman clone git://github.com/IvanChepurnyi/EcomDev_PHPUnit.git
git checkout dev

cd /var/www/html/
modman link ~/EcomDev_PHPUnit/
 Applied: UnitTests.php                   UnitTests.php
 Applied: app/etc/modules/EcomDev_PHPUnit.xml  app/etc/modules/EcomDev_PHPUnit.xml
 Applied: app/code/community/EcomDev/PHPUnit  app/code/community/EcomDev/PHPUnit
 Applied: lib/EcomDev/PHPUnit             lib/EcomDev/PHPUnit
 Applied: lib/EcomDev/Utils               lib/EcomDev/Utils
 Applied: lib/Spyc                        lib/Spyc
Successfully create symlink new module 'EcomDev_PHPUnit'

phpunit
app/code/design does not exist