Jenkins for Git Triggers

As much as I try to be "Bleeding Edge" sometimes I pick up techniques that other people have used often and much earlier. Such is the case with Jenkins, a tool to "Orchestrate" actions in response to events - and I'm sorry if that sounds like "it does things to stuff" but Jenkins' broad applications prevent a more definitive description. 

Specifically, with the Git (or Github) plugin, Jenkins can do a wide range of stuff in response to a push, including running unit tests, tagging, migrations, et al. In combination with Fabric, it allows for a wide range of powerful remote/site config actions.