"Jeremy Lew" writes:

I looked into this a bit recently and discovered that the FAA offers this,
it's called the "Aircraft Situation Display to Industry" (ADSI) feed, and
it's free to businesses if you sign a letter of agreement with the FAA.

....and maintain an approved line and equipment in their data center...

(I have no idea what the conditions in that letter are).

http://www.fly.faa.gov/ASDI/asdi.html

I think I recall that MIT has a feed. I was out there not long ago and
meant to ask around about it.

If someone comes up with a good plan to get the data for distribution as
freely as the FAA will allow (There are limits.), please tell me. I'll
be happy to chip in some money and provide server resources.

--kyler