The Today Show reported it a couple of weeks ago. Their take was that it isn't much of a threat---yet---to the US.

>Hezbollah has been active in the United States since 1980, and is also in Canada. They collect more money and contributions than any other organization in the world. Last week the FBI for the first time put out a letter to its officers to watch Hezbollah in the United States. Since 1980 the FBI has ejected 300 Hezbollah members from the United States. The reason given as to why the FBI is just getting around to doing something serious: The war in Iraq.