How not to sync your blog to your Rails app (woes with PubSubHubbub)
blog.aisleten.com
blog.aisleten.com
My goal was to display in an Rails App the latest entries from a wordpress blog.
In the end I used this http://code.google.com/apis/ajaxfeeds/documentation/ which worked perfectly, without any hacks in Rails.
You can check it out on www.2performant.com at the bottom. It's all javascript.
You can either install the WP app on the same server as your Rails app, or you can just create a custom user and SSH tunnel for your DB between the DB server and the WP server.