Fightinjoe-merb-blog is a project mainly written in RUBY and JAVASCRIPT, based on the MIT license.
Personal blog software written with Merb
FightinJoe Merb + DataMapper + jQuery blogging system
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A wise man once said, "every beginning Rails developer should write their own blog software." (Geoffrey Grosenbach - http://nubyonrails.com/articles/about-this-blog-memcached)
I'd extend this to say that every Rails developer should write their own blog software in Merb (or Sinatra, or Camping, or Django, or any other alternative framework).
This is my ongoing investigation into alternatives to the norm. It is a blogging app that solves my very-specific blogging needs. It probably won't suit your needs, but you may find some insight by looking at the way that I've done things.