Shoutbox

I was just wondering

Is there a feature/plug-in that allows you to send messages simultaeneously to  all open convos?

just as an example. I want to say 'goodbye' to 10 different people and i am to lazy to type it 10 times ( or use the message helpers) so i use this 'thing' to send a msg to each person at the same time..

if this doesn't exsist then i reakon it'd be a useful feature

you can use /all and then your message to send it to all open conversations.