When it finally ships, the Longhorn release of Windows will include a number of interesting new technologies. But it is the technology currently code-named “Indigo” that stands out as the most important product for anyone who cares about how diverse systems are glued together. To understand Indigo, however, there are four points you need to get your mind around. Elsewhere, .NET luminaries discuss themselves, their technology expertise, and whatever else comes to mind, released twice a month. Elsewhere, the Longhorn Driver Kit is a fully integrated driver development system for Windows.