OnTheBus is mostly a backend for various internet related apps, and sites. It allows for various servers to access the system, connecting them into one central location. Thus sites can share content frameworks, apps, services, etc., without the need to have separate security measures.
Most of OnTheBus is invisible to the public. User accounts offer personalized content and files when logged in on the Home Page.
While OntheBus is no longer available to the public, there are a few of Robb's blogs that are still up and running, just click on the icons to the left.