Integration with Rules module

Thanks for the great module. I'm not sure if this is a feature request or a support request. I've started using simplenews on one of my sites however I would like to be able to set up a time delayed rule for when people sign up to a newsletter - e.g. Send out a specified issue 4 days after they have signed up. I know how to do this with the Rules module however I do not know how I can do this with the Drupal default Triggers and Actions modules.

Is there any integration between Rules and Simplenews, similar to the Simplenews_actions module?

Thanks for your help.