Ironically, the plotting is less of an issue for a Strange School crossover, where I already have convoluted plots hanging around to see if they're needed.
Group size is an issue, as those of us most likely to agree to gm can't really deal with huge groups. So, I'm figuring me, mneme, crash_mccormick, ebartley, jlighton, and our friend Erik (who doesn't have a 'blog, afaik), and we'll see if we're all interested when we start dealing with things like system, who's gming, and who's in which house. If we keep all of the above, I could see maybe adding one or two people, maybe not.
This is all brianrogers's fault, of course.