ALBANY, Oct. 16 — Back in May, in the private dining room of his Park Avenue office building, Peter S. Kalikow marked the end of his six-year reign as chairman of the Metropolitan Transportation Authority with a heartfelt news conference. It was time to open a new chapter in his life, Mr. Kalikow said, and he would step down as soon as Gov. Eliot Spitzer named a successor. Five months later, Mr. Kalikow, 64, is still on the job. Mr. Spitzer picked a replacement, H. Dale Hemmerdinger, in June. But the State Senate has yet to vote on the nomination....