Tapjoy starts fund to invest in Australian developers March 21, 2013 5:00 AM Dean Takahashi Dean Takahashi Twitter Profile Recent Stories: HP launches a 20-inch all-in-one that doubles as a tabletop computer AMD launches series of chips that get it into low-power laptops and tablets HP unveils an army of PCs featuring Intel’s new low-power processors Tapjoy's first investment in Australia is in Defiant Development.