Now I refactored a bit and put the source to bitbucket.
From the user view: It is uses the default Dajngo admin site and you can record expenses and check them in monthly or yearly view.
From technical view, you can find examples to the following django specific areas:
- Customized ChangeList view
- Custom filterspec
If you interested you can get the source using mercurial from bitbucket or download the latest version.