Extreme Programming does not mean programming naked while rollerblading down the side of the Grand Canyon. It does mean a new approach to software development that is both radical and common-sense. Unlike many software development methodologies, XP has been accepted quickly because its core practices--particularly code sharing, test-first development, and continuous integration--resonated immediately with software developers everywhere. Instead of impressing developers with a body of theory, XP got programmers to say, "Yeah, that\'s how I\'d like to work."