Different subject. I don't know if you heard Sean Hannity's radio show today but he was talking about having received a letter in handwriting identical to the Brokaw and other anthrax letters PRE 9/11. Other media outlets did as well and the postmarks were Indianapolis. I think he said his was saved and turned over to the FBI.
Re Hannity, I missed most of his show, but there's an article about it from the NYPost posted here.
Weirdly, the writer of one of those letters to O'Reilly put Hannity's name in the return address.