I believe Rackspace servers aren’t physically in Australia. I’ve worked with a couple of Australia companies, including NetRegistry and Anchor. NetRegistry was a big disappointment. Anchor has been very good. The also have experience with Servoy as I know at least 2 Servoy customers using them. They’ve helped us setup and optimize the server, including with Servoy Cluster.
Anchor: http://www.anchor.com.au/