* U.S. House preparing to vote on Senate 'fiscal cliff' bill. * Yen hits lowest in more than 2 years vs dollar. * Australian dollar pushes higher. The safe haven dollar fell on Wednesday as the U.S. House of Representatives seemed to take a step closer to striking a last-minute deal to avoid triggering a fiscal crunch that could threaten the global economy. The U.S. House of Representatives is preparing to vote on the Senate's "fiscal cliff" bill, Democratic Representative Alcee Hastings said on Tuesday, increasing the odds that Congress will stave off steep tax hikes and spending cuts. The safe haven dollar ... (full story)