Two things are different about my mirror. It has a better index of the messages (generated by a nice little Python script) to make the messages easier to browse. And it has three-step instructions to duplicate the whole website, so the site can work a bit like a chain letter. It reminds me of those programs that print themselves out. In this case, you download the website as a zip file, unpack the zip file, and then move the zip file into its own directory, which sets everything up for the next person to come along and make their own copy.
I also discovered Karma Banque. Interesting idea.