I've just published draft #2 of SRFI 2.  It was submitted by John Cowan, co-author of the SRFI.

Here are John Cowan's comments on the draft:

I may add maybe-cond later.

I will not be adding maybe-and-let*, because there is no portable implementation of and-let* (there is one for define-macro, one for explicit renaming, and one for syntax-case).

Here is the commit summary:

• new features from discussion
• new procedures and maybe-if
• Publish second draft.

Here's the diff:

https://github.com/scheme-requests-for-implementation/srfi-189/compare/draft-1..draft-2

Regards,

SRFI Editor