I wanted to add comments to this blog but I didn't want to use an external service for them. So I went back to the old and proven "email me your comments!" approach. I dont't see that specially intrincate for the commenter, considering that most comment systems already request an email address and ask you to solve a capcha.
Basically for each article there is a file with the comments. The plugin looks for the comments file and adds them to the blog entry.
Details about how to configure the blog to use the plugin can be found in the blog repo.