WordPress.org

WP Deploy is a plugin designed to solve some of the difficulties experienced by developers working in teams using version control software and multiple stages of deployment (local, development, staging, production etc.)

More specifically it allows multiple config files to be added through the admin system and then dynamically switched depending on the URL a user is accessing the site from.

In this way, a wordpress installation can be added to an svn repository (or any version control system) and checked out in multiple places that might have needs for differing config files.