They've all been written about by sceners in the past, but I think more outside observations would be enlightening. As a demoscener, you know what is scene and what isn't, and basically how it works. But I've found it nearly impossible to succinctly explain it to non-sceners without sounding like I'm crazy, or making it up, or giving them a very wrong understanding of core demo elements (e.g. "so it's all about doing things in small sizes?")
One leg up, the scene has done a very good job archiving information about scene groups, sceners, scene productions, and sub-scene productions, giving future researchers a lot of information to start from.