For those who do not know him he has been essential in providing security for Twitterers in Iran, setting up private networks to provide secure proxies to them, calling for media networks to remove the Iranians Twiterers information from their broadcast, and providing counter-intelligence services (including Basiji and Army Locations) within the Twitter community.
ProtesterHelp confirmed to me that he was attacked by a group of men that seemed to be either Iranian or Lebanese, while walking to class in Ohio. They drove up besides him and threw rocks at him while shouting, "Mousavi Fraud."
He further informed me that his personal information was leaked, and is currently being spread both online and inside of Iran amongst the government. The former most likely lead to this attack. God only knows what the latter will lead too.
The student reports that the local police "seemed uninterested" when he filed a report. I'm sorry to say that I expect the FBI to be just as uninterested, but I would certainly be happy to be proven wrong in that regard.