Regarding
#3:
Here is what I'm used to... When the (last) moderator drops, the users
hear something like "the moderator has left the conference" and then
get kicked back to music. If a moderator dials back in, music goes
away and the users are re-joined. It's intended to be a secure
conference, and the moderator is the security, right? Other
conferencing systems I've worked with behave like this as well (not
just Asterisk). I realize we're getting into the realm of fancy
features rather than a clean conference application, so I'm already
prepared take a hike. =) Could I emulate that behavior another way?
Regarding #4:
I don't have an opinion either way on the ding sounds really - it's a
cosmetic thing and I just thought I'd mention it.
Thanks!