I don't know whether anyone else is writing SRFIs in AsciiDoc, but
here's a Scheme script that converts an AsciiDoc file to a
submission-ready HTML file:
<https://github.com/srfi-explorations/srfi-from-asciidoc>.

It relies on Alex's great HTML<->SXML libraries from Snow. Currently it
requires Gauche, but it could be ported easily to other R7RS Schemes by
re-implementing the `run-pipe` procedure that filters a string through
an external program to get another string.