The Bidens are full of surprises! During Monday's taping of Oprah Winfrey's daytime talk show -- which she temporarily moved from Chicago to Washington D.C., so she could cover the inauguration -- Vice President-elect Joe Biden and his wife, Jill, showed up as surprise guests. When Oprah asked the couple the secret to their long and happy marriage, Biden glanced at his wife, whom he called "Jilly,"...