Based on feedback, I am enabling subject tagging. Subjects will be prefixed by [RCD] or [RCU]. This is a fairly religious issue for some folks; but the those that need/want it tagged _far_ outweighed any other response I got. I'm keeping the tag short, however, to try and minimize the effects for those that don't like subject tagging. I wish this were a per user setting, but .. it isn't.
List signatures are still enabled but shorter. I find them neccesary to help keep list management easier. This also helps reduce the case of people getting tired of a list and just marking it as spam (Which can have effects further than they intended). Hopefully with a technical audience such as we have here, that won't happen, but..
Enforcement that posters be subscribed is now enabled. Most of the other antispam things I do at gigo.com, are disabled for the lists. If SpamAssassin still thinks "spam" the message might get deferred for moderator review.
Lastly, some folks are doing sender verification. Because some folks still have DNS cached pointing to Bob's, and his would not verify the sender address I'm using, some folks are deferring (good) or rejecting (not so good) the mail. I'll contact those people in a day or so, recommending they clear their sender validation cache and/or check their sender verification cache settings.
Unless anything else comes up, I'll move back to more of a lurker role. If anything comes up, feel free to contact me, email or jabber.