What I might like better is if you can publish a blog from a NNTP feed. If there is a article which has some sort of verification and lack a "References" header

What I might like better is if you can publish a blog from a NNTP feed. If there is a article which has some sort of verification and lack a "References" header, then it appears as a blog post; if there is a "References" header then it will appear as a comment, and users can post comments using NNTP. Markdown would work, due to two advantages they have: It is easy to read even if it has not been rendered as Markdown, and there is a MIME type defined (so that a NNTP post using Markdown can have a "Content-type" header to indicate that). This is unlike bbcode, which doesn't have these advantages.