SubEthaEdit: a powerful and lean text editor. And it's the only collaborative one you can actually use. by combining the ease of Bonjour with the world's best text collaboration engine, it makes working together not only possible but even fun...

This could be a fun tool to use for those user group discussions (like pinoyjug meetings), or hackfest like scenarios. Wonder if there is an open source alternative. A Vi or Emac integration would be slick!