Rails blogging system similar to Wordpress ?

Just curious if there is a Rails blogging system similar to Wordpress ? We are slated to do a project on this and of course it's going to be a PHP project as Wordpress is PHP. I looked at some of the Wordpress code and realized why I like Rails MVC architecture as it appeared to be a mess to me.

I've never used wordpress, so I can't compare, but you might take a look at mephisto

http://mephistoblog.com/

Jodi