Thanks again to three-time recommender phynix a.k.a. Kyle for this superb suggestion. I think this is his best work yet!
APTonCD is an application that backs up all of your packages downloaded from apt-get or aptitude onto a CD or a DVD. This is perfect if you ever lose an internet connection or if you want to quickly install new operating systems without having to remember a long list of packages you needed to install.
You can get rid of the need for an internet connection entirely by downloading and burning an entire repository to a CD if you wish (well, probably a few DVDs :-D). YOu can also add .deb packages manually with the add package feature, or by dragging them in from Nautilus.
My favorite feature is the ability to create a meta-package with all of the packages you have installed. This makes it easy to trick out a new Ubuntu installation with a single command. This might be a good way to replace Automatix with your own custom solution.
You can install APTonCD through the command line with the following:
sudo apt-get install aptoncd
For those of you who are planning on trying this out, I have a question for you:
What packages would be essential for your APTonCD disc? What couldn't you live without?