A screencast showing how to install GitMon in 5 minutes on a Mac.
sudo easy_install gitmonThen run
gitmonfrom terminal and it will create a default configuration file for you (~/.gitmon.conf). Edit it and you're good to go!
Mac OS X users who have Growl installed can get it all working in 3 minutes. It will involve some additional configuration twiddling for Linux and Windows guys, but that will be improved in future releases.