I am looking for a third party processer (like paypal, cdg, bluepay etc) that is based in the US but will accept australian citizens. The reason for this is most of m customers are in the US and I don't want them getting slugged foreign exchange fees.

I do have a US registered LLC and federal EIN, i'm just not a citizen there.

The only one close i've found so far is netbilling but i am not interested in directly accepting cards on my site yet.

Does anyone know of a group i can use?

You may be interested to look into http://www.merchantplus.com/ they have a stable service and also able to help with Canadian and US merchant accounts, have been in business for ages.

Have you looked at moneybookers.com