Alaska Gov. Sarah Palin, facing a string of costly ethics complaints, formally unveiled a defense fund Friday to help pay her legal fees — now surging past the half-million dollar mark. "For Alaskans, the time has come to end the siege on our government by political tricksters. Enough is enough. With the help of reform-minded advocates from across our nation, we will stand up for what is right," said a message on the Web site for the Alaska Fund Trust.