You could simply script a little something that will buffer anything said in a channel, and only relay those messages at a pace that you feel comfortable with. It's a quick fix that will work effectively.
To give you some tips, you could use a hidden window with the same channel name as the one you want to buffer, accompanied by its $cid. Then it's a matter of adding incoming lines to the end of the hidden window (a simple /aline), and using a /timer to systematically copy a message from the hidden window to the channel window on an interval that you prefer. For this you use $line to read from the hidden win, and /echo to echo to the channel window.
