The following is a short list of some web sites that are reputable and provide some solid information on ADHD. That is not to say that I would agree with all of what you will find posted on these sites. Nevertheless, they generally provide information based on solid clinical experience or research and are not trying to sell snake oil or fear mongering.

National Attention Deficit Disorder Association  http://www.add.org/

Children and Adults with ADHD, CHADD http://www.chadd.org/

National Resource Center on AD/HD  http://www.help4adhd.org/

Additude Magazine Website http://www.additudemag.com/

ADD Consults article section http://www.addconsults.com/articles/index.php3

Northern County Psychiatric Associates http://www.ncpamd.com/adhd.htm

ADDvance http://www.addvance.com/index.html

Diet and Weight Management Strategies for Adults with ADD (ADHD)By Kathleen G. Nadeau, Ph.D http://www.addvance.com/help/adults/weight.html