Some other websites to check out...
The Organ Historical Society - supporting historical organs in the United States
The American Guild of Organists - the place to be seen, when you're an American organist
The Guild of Carillonneurs in North America - a bit more obscure, but they have lots of fun ringing bells
Holland, MI chapter of the American Guild of Organists - one thing I do when I'm not practicing (or mom-ing), is help lead this local group of organists
Pipedreams - American Public Radio show about all things Pipe Organs, with the amazing, knowledgable (and nice) Michael Barone
-- I can be heard on two programs: The Buffalo Shuffle and In the News