According to Jahan News website , Iranian blogger, Hossein Derakhshan  (aka Hoder), a prolific blogger often described as the godfather  of the Iranian blogosphere, has been arrested In Tehran. Hossein returned to Iran about three weeks ago and is being investigated on suspicion of espionage for the state of Israel. According to the same source, Hossein seems to have admitted participating in spying activities for Israel. In January 2006, Hossein visited Israel as a Canadian citizen and blogged openly about his trip as breaking a major taboo :
This might mean that I won’t be able to go back to Iran for a long time, since Iran doesn't recognize Israel, has no diplomatic relations with it, and apparently considers traveling there illegal. Too bad, but I don't care. Fortunately, I'm a citizen of Canada and I have the right to visit any country I want. I'm going to Israel as a citizen journalist and a peace activist.
So far, the arrest of Hoder has not been confirmed by other news sources.