Iranian Elections--Rigged?

So incumbent Mahmoud Ahmadinejad was pronouced the winner of the Iranian presidential elections tonight and some claim that the elections were rigged (and reformist challenger Mir Hossein Mousavi actually won). For example, in this article (entitled "Iran's Stolen Election") from the New Yorker, Laura Secor writes:

"There can be no question that the June 12, 2009 Iranian presidential election was stolen. Dissident employees of the Interior Ministry, which is under the control of President Ahmadinejad and is responsible for the mechanics of the polling and counting of votes, have reportedly issued an open letter saying as much. Government polls (one conducted by the Revolutionary Guards, the other by the state broadcasting company) that were leaked to the campaigns allegedly showed ten- to twenty-point leads for Mousavi a week before the election; earlier polls had them neck and neck, with Mousavi leading by one per cent, and Karroubi just behind."

This picture, from Andrew Sullivan at The Atlantic shows statistical evidence of the fraud.

Sigh.