Go to www.faasafety.gov and register if you haven't already, but if you have, look for online courses.  You will find two courses there.  One is called Navigating the DC ADIZ, TFRs, and Special Use Airspace, but references the old ADIZ.   The new course there is called "Navigating the New DC ADIZ", and will give you all the information you need about it.  It's written by one of the committee members who redesigned the ADIZ.  The new ADIZ takes effect on 8/30/07.

Ron

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Has anyone beside myself heard of the new 60nm radius ADIZ around
DCA? This new ADIZ is supposed to go into effect on 08/30/07.

I called flight service and although the briefer sounded confused he
confirmed this new ADIZ. He said there would be a smaller 30nm FRZ
(he called it) which it would be even harder to fly in.