Google cofounder Sergey Brin is, two days away from his company's first-quarter earnings call, sunning himself in Tahiti. As is Greco-American blog tycoon Arianna Huffington and Wendi Deng, wife of News Corp. CEO Rupert Murdoch. Huffington is reportedly there on vacation, but it's a stretch to think Brin and Deng are also there by sheer coincidence. Anyone have a bead on what prompted the South Pacific power summit? Do let us know your theories.