I go to Times Square all the time, so this one hits close to home.
There isn't enough information to conclude who's behind this yet (though you probably shouldn't put your money on radical Quakers or Mormon fundamentalists), but early reports suggest that an SUV that caught fire in Times Square was loaded with gasoline tanks, propane tanks, gun powder, and a timing device. Several blocks have been evacuated. Some are concerned that the license plate of the Nissan SUV was registered to a Ford. It's a bit early to jump to conclusions, though, as facts are often inaccurate until sifted and confirmed. Police are saying it isn't a terrorist attack. I'll keep you updated as more facts surface. (I'd jump on the subway and head down there, but I have a strange suspicion it's not running.)