Here is what he should do - QUICKLY, like a bunny, set up a presidential investigation team, to test the water in 2012, carry on his Senate duties, attend few meetings, do little of anything, travel a bit on taxpayers money, visit 2-3 countries and commiserate with the people, return home, deny you are running for president, and then ... run. He would have more experience than Obamessiah when he ran.
Or he can stay in the Senate, finish this term of 2 years, run again, get re-elected, serve six years, serve in the Senate and do his service where he is best qualified, unlike some others.
Obama