I've just created a new blog publishing system. It's a simple perl script, using Markdown, and a series of Template modules:
Right now, this will generate a post page, along with an index page that is a collection of all the posts in the system. I'm thinking about adding tag pages, along with some pagination so that none of the pages get too ridiculously long; maybe even some date-like pages. Who knows. Commenting will probably come last, if at all.