This question is fascinating, but I think it's clearly EL&U and not Writers. Am I correct that this is off-topic here?
I think we should leave it here.
Sending the question to English will doubtless produce all manner of interesting technical answers. (I don't see any serial semicolon questions over on English, so unless it's buried in another question there, I don't think it would be a duplicate there.)
However, if Lauren wants to expand the question to include the context of the work around the text cited, that would be a question that's okay here. (As in a readability/style question or even a small critique. I for one would love to see more tech writing critique questions here, but that would be a slightly different kind of question.)
I personally am fine with questions that can potentially exist on this site or on English. (Or even on both; if Lauren would like to get more into the mechanics of the grammar involved, EL&U would br great for that.) There's significant overlap between the two sites.
However, in the end, it's all about what's best for the question. Does the answer have more to do with readability and how to write? Then it's better off on Writers. However, if it's more concerned with what's grammatically and mechanically correct, than it'd get better answers on English.
As I just put in a comment reply:
@justkt - I think it falls between the two somewhat. It is about the appropriate way of writing this - a writing style question - while the focus is on a punctuation mark - a punctuation question. If we treat it as writing style "how can I show this list correctly and clearly", not what the rules strictly say, it works better here. For an answer about "what do the rules say we should do", EL&U would be better
The context of this question means I think it fits better here