It's a Moslem charity now headquartered in Chicago that's been linked to Hamas and that the U.S. government has now banned as terrorist-related. Apparently it started in Florida. I think it's been linked to the radicals with whom Padilla associated at the radical Masjid al-Iman mosque in Ft. Lauderdale. It was in Florida (and in the Ft. Lauderdale area) when Padilla converted and McVeigh was in the area. Now, at a time when Padilla was just arrested getting off a flight to Chicago, it is in Chicago.
I believe OKCSubmariner can tell you a lot more about this "charity."