Organizations
Aikikai Hombu Dojo - World headquarters of Aikikai-Aikido
Aikido Schools of Ueshiba - Official ASU website

Dojos
Shindai Aikikai Orlando, Florida
Sarasota Aikikai, Florida
St. Petersburg Aikikai, Florida
Milwaukee Aikido Club, Wisconsin
Aikido Shobukan Dojo, Washington D.C.
Boulder Aikikai, Colorado
Chicago Aikikai, Illinois

Information
AikiWeb, worldwide information on Aikido, seminars, dojos...
Aikido FAQ, more information, multimedia)
Aikido Today Magazine, in English (Susan Perry)
Aikido Journal / Aiki News, in English (Stanley Pranin)

Books
Aikido and the Harmony of Nature, by Mitsugi Saotome
The Principles of Aikido, by Mitsugi Saotome
On Mastering Aikido, by Daniel Linden

Supplies
Bujin Design (USA)