Update: Done and Done. Obama and Biden officially sworn in for a second term. Tomorrow begins the public festivities, which includes Obama's speech, the parade and the Commander in Chief's ball. Live stream also at C-SPAN.
Obama took the oath of office using the Robinson family Bible. After, he said to Sasha "I did it." Tomorrow, Obama oaths on the Lincoln Bible and Martin Luther King's Bible.
Another view:
Michelle Obama's grandparents' Bible, which Obama used for the oath:
Biden sworn in earlier today by Sonia Sotomayor:
Obama and Biden lay a wreath this morning at Arlington National Cemetery: