Well, Obama must be absolutely happy for Ahmadinejad wanting public, not private talks. No, seriously:

Speaking at a meeting of medical school deans, Ahmadinejad said Iran "will soon pursue a new round of diplomatic activity" amid a new position of strength for the Iranian government, the Iranian Student News Agency quotes him as saying.
"I will go to the United Nations and will invite Obama to negotiations," Ahmadinejad said, adding that such talks would be "in front of the international media, not a sit-down behind closed doors in order to talk about matters." 

See? Imagine a "sit-down behind close doors" with Ahmadinejad.