He doesn't want the job. He's moving to Hawaii into a $35 million mansion where he will preside as President of Hawaii.
The new benevolent dictator will be Valerie Jarrett. Official announcement comes Dec. 21, 2012.
That's a scary thought. Obama/Biden win in November. After the Electoral College approves the ticket, Biden resigns to spend more time w/ his family and Obama appoints Jarret to VP. Obama then abdicates and absconds to Hawaii leaving Val-Jar Binks in the Oval Office :-(