Wall Street Journal (page one):
Democratic presidential candidate Sen. Barack Obama's selection of Sen. Joe Biden to be his running mate reached a pivotal point in a secret meeting on the night of Aug. 6. Sen. Biden was whisked into a Minneapolis hotel room through a back entrance before Sen. Obama left for his Hawaii vacation. They talked one-on-one for 90 minutes. "It was spirited and pragmatic," says one adviser who was briefed.
Later that afternoon on his private campaign bus, Sen. Obama told his aides, "It's time to make some phone calls." After receiving his, Sen. Biden informed his family, who began gathering -- in the glare of TV lights -- at his Wilmington, Del., home. He waited until the next evening to tell his senior advisers that he needed their help to write a speech -- to accept Sen. Obama's offer to become his running mate.