Solenopsis started as just a simple ant migration tool to help deploy to Salesforce. Since it's inception, it has grown to include other salesforce related tools. The current version of Solenopsis can be used via it's Python wrapper to do full unattended deploys to both sandboxes and production environments.
Given at Dreamforce in 2012 the presentation discusses how Red Hat does Continuous Integeration & Deployment. This includes sandbox structure and Solenopsis with Jenkins.