Useful links:

ADHD Clinic at UNCG
Noble Academy
Parents of Children with ADHD
CHADD

FIU's Summer Treatment Program (STP)

Articles and stories about STP’s around the country: 

ADHD Summer Survival Tips, WebMD, May 1, 2007
Camp for Kids with ADHD, Eyewitness News, WABC, August 8, 2006
A Special Camp for Kids with ADHD, Healthology, May 22, 2006
Summer of Hope, Child Magazine, August 2005
A Summer of Fun for Children with ADHD, WebMD, April 12, 2004