I have made new versions of SRFI 117, List queues, and SRFI 121, Generators.
You can download them from:

<http://www.ccil.org/~cowan/temp/srfi-117.html>
<http://www.ccil.org/~cowan/temp/list-queues.tar.gz>
<http://www.ccil.org/~cowan/temp/srfi-121.html>

Or you can wait until the SRFI editors post them to the usual places.

--
John Cowan          http://www.ccil.org/~cowan        xxxxxx@ccil.org
In computer science, we stand on each other's feet.  --Brian K. Reid