ClientServerMAME v0.7 is released. ClientServerMAME is a fork of MAME (Multiple Arcade Machine Emulator) that allows players to play via the internet.

ClientServerMAME v0.7 Changelog:
Chat: You will be able to chat with other players in-game. Press 't' to open the chat dialog then type your chat and hit enter. The chats are color coded according to player.
Stats: Text box displaying bandwidth usage, ping, connection status, etc.
Bug: Fixed lag on games with anonymous timers (many old games)

Download: ClientServerMAME v0.7
Source:Here