What first got me looking for one was the comicvine.com website whichis powered by django:
http://www.comicvine.com/
Notably, I thought the search/drop down results bar was badass and wanted something similar on my site. The entire site is well done and impressive to me. It says clearly at the bottom of the site that it's powered by django, a free CMS lke Joomla, so I set about installing it on my Dreamhost account.
I failed. Got pretty far but still failed to get it working using these instructions:
http://wiki.dreamhost.com/index.php/Django
somewhere around here is where it fell apart:
I'm guessing the path to my python install or django install isn't right* Otherwise, without easy_install, edit .bash_profile to add Django to your path and python path
export PATH=$PATH:$HOME/django_src/django/bin
export PYTHONPATH=$PYTHONPATH:$HOME/django_src:$HOME/django_projects
which lead to this part not working:
Thankfully, Dreamhost has a "one click" install of Joomla so I have that up and running. I also one click installed phpBB 3.2 and have that running so I can check out mods, themes, etc so I'm better informed when making suggestions for VV.* Link admin_media to your media domain from the Django source code
$ ln -s $HOME/django_src/django/contrib/admin/media $HOME/media.mydomain.com/admin_media
* Start a new project in django_projects
$ cd django_projects
$ django-admin.py startproject myproject
$ chmod 600 myproject/settings.py
This is the list of what you can "one click" install on Dreamhost:

I was able to get my Coppermine Gallery up and running so have fared well for the most part with this stuff even if I have to manually install and modify some code here and there.
My command line knowledge is very limited. I suck at setting the correct paths to files, etc.
Back on topic, Joomla looks kinda cool and there's a large support base with third party extensions, mods, etc but I'm new to CMS and am curious if anyone has an opinion or recommendation. I checked this site and it looks like there 100's of CMS options available. Take into consideration that I'm not a coder and would only want to modify small bits of existing scripts, etc. Joomla might be my answer with it being on my server already but If someone is a huge fan of django or something else, I might try again to get that up and running.