I like this a lot (no surprise, since I probably have like a dozen series going).

I imagine the creator would either select specific stackers who can post in the series or leave it open to anyone, as well as making a similar choice about where it can be posted. We'd want the creator to be able to adjust those choices indefinitely.

The advantage of the series post type for the author would be inheriting an audience and perhaps working off of a template (plus the joy of contributing to something greater than oneself).

The advantage for readers would be less notification clutter and more tailored content subscriptions, as well as being able to easily find other entries in the series. I'm thinking there could be "Previous Entry", "Next Entry", and "Full Series" links at the bottom of each series post.

I don't think there would need to be anything different about fees or zap shares, though. These would essentially be independent posts as far as SN is concerned, with the exception of being able to see the whole series on a search/sort page.

Another step towards evergreen-ness, @elvismercury (you absentee son of a bitch).