I think they had a relationship going way back with Telstra when IWG had a product that was used in Telstra franchise stores to do reports or something via a VPN. That opened the door and i guess they stuck at it and their timing was good. They had/have a number of other local IT services companies promoting the product but i have no idea of the traction if any they have gained http://troppus.com.au/services/software-solutions/
http://www.corazonsystems.com/contact-us/company/partners/
http://www.signaturesoftware.com.au/joomla/index.php?option=com_content&view=article&id=74&Itemid=76