The best way to interact with hackers &#38; founders in Sydney is via Silicon Beach.  They have weekly Friday drinks, usually at The Grace.<p>Check the forums for more info:
<a href="http://groups.google.com/group/silicon-beach-australia" rel="nofollow">http://groups.google.com/group/silicon-beach-australia</a><p>As for YC meets, you might have to organise one yourself :)