Rumors are circulating, but there has not been a lot of media coverage, nor has there been much speculation. (Hat tip to Greg)
Here is some information (and other links) from Regime Change Iran.
While on the subject of Iran, AC at Fore Left has a piece here that is certainly worth a look, followed by some thought.
Iran knows we have troops on both sides of them. It should come as no surprise that a stable Iraq and Afghanistan is not in the best interests of this present regime. So equally, it should come as no surprise that they have been trying to subvert the cause in its neighbors, almost from day one.
Now that Iranian elections did not go the way its president would have preferred, there might be some measure of instability for the government to deal with, if Khamenei is in fact dead, or near death.