GNU Guile release 2.0.7 has been officially released; a copy of its announcement is here:
  http://article.gmane.org/gmane.org.fsf.announce/1869

The first item in "notable changes" is that
"SRFI-105 curly infix expressions are supported".
It references http://srfi.schemers.org/srfi-105/srfi-105.html and explains that,
"This allows users to write things like {a * {b + c}}
instead of (* a (+ b c))."

This is great news, and I thought everyone here should know.

Thanks everyone!!

--- David A. Wheeler