I recall from somewhere here on ATP where Trish and/or Dave mentioned the mounting effort that goes into a theme week: soliciting articles, calling would be sponsors, finding (or at least looking for) an appropriate guest for their podcast, relevant banners, et cetera, et cetera, and all the logistics that go with them. And that this is the reason we don't have a theme week every week. I agree, we have a SuperDave (and a SuperTrish), but he's not Superman (and she's not Superwoman). I hope we realize that it is all in fun that we are getting a little carried away with some of the suggestions.
I will say, though, that if we ever do have a soils week, I would write article(s) for it.