I'd keep my distance... Invest at your own risk...Remember you always make money on the ground floor of a ponzi... just need to make peace when the floor collapses beneath you.
All Australian Companies are require an ABN & ACN to be listed on all official documents and websites... they have none... So you won't have any protection should this go under.
Since there's no contact person, No directors, just an email...
http://static.neatorama.com/images/2007-08/complaint-department-grenade.jpgI've searched the company listings for Sun Mining and nothing appears to be in NSW.. and those companies that are listed are actually mining companies with no relation to data centers or BTC.
I've tried to contact One Farrer Office to confirm if there is a Sun Mining office but everything is via email... So I'll wait and see.