Attention:

the ACM website is entirely open source. When I started thinking about how the site could be most useful to the organizaion, I realized we weren't building it so solve solve any specific problem but rather to teach us how to use Rails. So now I reason that since that is how I derive the most value from it, the same may well be true for everyone. Edit whatever part you care about, use the code in your own project, ask questions, ...