Zach Holman of Github gave a great talk on some of the tools they use to simplify their dev process from local setup to deploying.

As you grow, your team's development environment becomes really important. How long does it take to clone, set up, and boot your apps? Can your employees still be productive on an aging codebase? How can you automate CI, hooks, and other setup for new projects? Is any of this fun anymore? GitHub ran into these problems as we expanded our team tremendously over the last two years. Let's look at some of the ways we've improved our employees' development environments.

http://zachholman.com/talk/unsucking-your-teams-development-environment