There has recently been a google groups mailing list set up for organising game groups. It's pretty much Melbourne based at the moment, but I don't believe it's just restricted to Melbourne.
"The Geektogether happens once every season, where several game groups and gamers without groups get together to have a few drinks and tell tall stories about gaming... and organise new game groups! The Geektogether mailing list supports this, bringing Aussie gamers together. The last Geektogether was March 1st, and there are already 3 new game groups from it."
There was another post looking for gamers for a new RPG earlier today (as in the date of this posting)