Take a number letting people who want to chat with you know that you are already chatting with n other people
We use chat a lot, with team members across the globe. It never fails that for 1-2 hours a day I get 3 or more people each wanting to discuss a different topic. I sometimes post "You are number 3 in the queue" to let them know I know they are there, but it will be a few minutes while I finish with the people that started chatting with me first.
It would be nice if I could enable the "Take a number" feature during busy hours so that new chat-mates are automatically notified there are n people in the queue in front of them. The notification could be a visual indicator there is a queue, or an automated reply.
But please implement sort by most recent chat first before you do this one.