Read Comment System by superkuh (superkuh.com)

Type, "/@say/Your message here." after the end of any URL on my site and hit enter to leave a comment. You can view them here. An example would be,
http://superkuh.com/rtlsdr.html/@say/This is a comment.

I love how superkuh’s comment system works. I don’t think I’ve ever seen a set up like that. Very clever. I wonder how it’s done and why it’s not more widespread? Could it be dovetailed with something like Webmention somehow?