E3.1B or better know as FreePlay is offering Australian developers the chance to show case there mod, map, etc
small snippet from the web site
Free Play LAN
Free Play will host a LAN operating throughout the conference dedicated to hosting home grown multiplayer FPS mods, levels and maps. For conference attendees, we'll have some PCs set up for multiplayer gaming when you're taking a break between sessions.
Modders, and mappers: contact us ahead of time about installing your stuff onto our server (open to Australian mappers and mod projects whether or not they will be attending the conference):
For more infomation vist the free play web site - Free-play.org