New alternatives for rails/init.rb in Rails 3 gems

In Rails 3 the rails/init.rb in gems is not automatically executed
anymore (see https://rails.lighthouseapp.com/projects/8994/tickets/3745-railsinitrb-is-not-being-called-anymore).
As I see there a now two options:
1. Put scripts in config/initializers.
2. Create a lib/my_gem_name.rb

The second alternative seems to be used for example by devise (http://
github.com/plataformatec/devise).
Is that right?