Client platform version can be retrieved live with /ids and is also recorded in the playerdetail module.
Clients can receive chats while in lobby state by having the shell form present a HtMessageBox with the chat and the player is it from. This feature was designed to be used with the moderator whisper command.
New command /t that can be used in game to send chats that only appear to players on the same team. Observing players cannot use team chat.