Could always break up the notices to send to 10 at a time or something if you need to.
WATCH system looks like it might be useful. Almost does what I'm looking for. If it also causes away messages to be sent, that would be everything right there.
Difference between private chats between users and a channel is that private chats just send messages to users and you have to create and admin a channel. I was looking for something more user friendly than having to create and admin channel before you can chat.
