theodp writes: "Facebook announced it's chosen tax-haven Dublin for its international HQ, but not all are buying COO Sheryl Sandberg's line about local world-class talent being the motivation behind the move. The Irish Times recently reported that Irish subsidiaries owned by U.S. multinationals are opting to convert to unlimited liability status, concealing the financial performance of their Irish operations from public view. They include Microsoft's incredibly-profitable Irish subsidiaries Round Island One and Flat Island Company, Google Ireland Holdings (Mission? What Mission?), and a subsidiary of Apple Computer. The conversions have occurred as U.S. tax authorities have increased their scrutiny of international mechanisms used by American multinationals to reduce their taxes at home. Interestingly, Sandberg worked as Google's VP of Global Online Sales & Operations prior to joining Facebook."