Was the new Iranian President one of the Iranian captors of the Iranian Hostage Crisis of 1979?

It appears so. From Captain's Quarters:

Gateway Pundit, My Pet Jawa, and LGF all have highly interesting documentation -- including a number of photographs -- that appear to indict newly-elected Iranian President as one of the radicals who seized the American embassy in 1979. The photographic evidence is bolstered by a number of sources on the background of president-elect Mahmoud Ahmadinejad that put him in the center of the organizations involved in the hostage crisis that destroyed Jimmy Carter's re-election hopes and made the US look weak and toothless. If so, and the evidence looks damning, then one could make the argument that Ahmadinejad helped start the Islamofascist offensive against the United States.

UPDATE:

Now it appears that some of the actual American hostages are corroborating this story.