On WHT-AU there is a section setup specifically for hosting requests. It's very useful and personally we have profited from the interactions. On WHT requests by posters isn't allowed and offers from hoster definitely not allowed (apart from the offers section). Is there any reason WHT doesn't have an offers section? At the moment most host providers are restricted to making 'helpful' comments on posts in hope that their signature gets noticed.
I would have to agree with Andrew. Australian bandwidth costs way more compared to US bandwidth. This is the reason behind why there are less Australian hosts - people would just rather save money and buy US hosting.