The national organization for kiteflyers all over the world. Provides insurance for kiteflyers and events, a great magazine four times a year and has lots of other kite related information on the site. Go here to join the AKA.
SJKF member Charles Stewart has a nice web site. Charles lives in Manhattan and organizes events in the Metro New York and Northern New Jersey areas as well as an annual festival in Cancun in February each year.