Another mailing list you might want to tap into is a spinoff of
piporg-l, eorg-l.  A while back some pipe organ zealots drove a bunch
of electronic organ enthusiasts off piporg-l, and they formed an
auxiliary list.  The zealots have mostly left, and most members belong
to both, but certain topics appear only on eorg-l.  It's fairly light
traffic, so there's little need to use the digest form.  To subscribe,
use the same format as for piporg-l, except the server is at:

        listserv@cfrvm.cfr.usf.edu

and use eorg-l instead of piporg-l