> If we manage to arrive at a SRFI 177 design that Scheme implementors
> are
> generally satisfied with, would you be willing to ship the macros with
> s7?

Yes.

> The current s7 implementation is a 27 lines, 5 lines of which is a
> `split-last` helper. So it's not huge but it'd be nice to find
> something
> even simpler.

It looked fine to me -- I'll stare at it some more.