I updated the About Box sample slightly, with a simplified tab interface. I also submitted it as a Code Project article, so if you got here from there, welcome!
I still use About Box in every application I write. As a developer, it's always helpful to know exactly what assemblies you're loading, and where they are coming from. Particularly in the case of a smart client, when some of the assemblies are downloaded via HTTP and others are in the GAC (third party controls, etc). Not to mention developers who don't keep their shared controls up to date..