Course Builder is the code that powered Google's first MOOC Power Searching With Google. Yesterday, Google made Course Builder available to the world. You need to have some strong coding chops to build a course with Course Builder. If you have those skills or have people in your organization possessing those skills, Course Builder could be a platform that you want to try for building courses.
Even if you don't plan to use Course Builder for developing online courses, you may want to take a look at the Design Process pages to gain some insight and ideas for building online courses regardless of the platform used to deliver the content.