Further to the previous post on this. The Torbay Tech jam now has it’s own minetest server. To find out more please go to the Torbay Tech jam site and connect to the IRC server via that the IRC page and ask in #chat, you can then be given the details.
There is a tech jam blog post with a list of features and installed mods etc. However one main feature is that you can join IRC and chat with people in the game and if they type something on the built in chat then you see messages in the chat room.