This plugin uses Rails 3 with Spree to make payments with Dineromail. Its based on the spree_pag_seguro gem (https://github.com/hooppe/spree_pag_seguro). All credit to him.
Add the gem to the Gemfile pointing the repository.
gem "spree_dineromail", :git => "git://github.com/jstnn/spree_dineromail.git"
Copyright (c) 2011 [Nicolas Justiniano], released under the New BSD License