http://www.rollcall.com/news/31172-1.html?type=printer_friendly
“Vice President-elect Joseph Biden will officially step down from his Delaware Senate seat on Jan. 15, ending a Senate career that has spanned more than three decades. Biden secured re-election to the Senate in November, even as he won election as vice president.
Biden’s letter of resignation, addressed to Vice President Dick Cheney, who is President of the Senate, was read on the floor moments ago. “
Thanks for the update on the Jan.15 date.