The Australian magazine BRW has published a list of Australia’s richest entrepreneurs. Heading the list is Nathan Tinkler, 32, who has a net worth of $440 million. He made his money mining investments.

More interesting (at least for me) is Daniel Tzvetkoff who at 24 is in 15th place with a net worth of $120 million. The article mentioned he ran an internet business, so a further search revealed that he operates the company Intabill, an internet payment processor like PayPal. They seem to service clients that most payment processors tend to avoid, porn and gambling. Two areas that would have high levels of fraud, but if you could avoid this, potentially and obviously very profitable areas.

The other internet entrepreneur on the list is Ben Keighran, who has a net worth of $28 million. He started a company Bluepulse, which allows people to use content from their PC and use it on their mobile phone.