wordpress_to_what_ever_else.rb

require 'rubygems'
require 'active_record'

ActiveRecord::Base.configurations['db1'] = {
  :adapter => "mysql",
  :host => "",
  :database => "",
  :username => "",
  :password => ""
}

ActiveRecord::Base.configurations["db2"] = {
  :adapter  => 'mysql',
  :database => '',
  :username => '',
  :host     => ''
}

class Wp_posts < ActiveRecord::Base
    establish_connection "db1"
end

class Post < ActiveRecord::Base
    establish_connection "db2"
end

old_posts = Wp_posts.all

old_posts.each do |old_post|
  post = Post.create(:title => old_post.post_title, :body => old_post.post_content)  
  puts post.save
end