Rumours that the webmistress has this particular disorder are completely unfou - oh look, a kitty!
About.com: Attention Deficit Disorder
http://add.about.com/
Like most About.com topic sites, this one has a decent assortment of informational articles and a lot of pointers to other resources on the web. A good starting point.
ADD Forums
http://www.addforums.com/
A very active set of discussion forums on various aspects of living with ADD, with an international membership.
ADDitude Magazine
http://www.additudemag.com/
An American magazine for people with ADD and their families. Contains information on the print magazine, plus a collection of online articles and a free e-mail newsletter.
Adult ADD Strengths
http://adultaddstrengths.com/
A blog by life coach specializing in helping adults with ADD, which focusses on the ways in which ADD traits can be viewed as strengths, such as news items on significant accomplishments by people with ADD, related humour, and treatment news.
Attention Deficit Disorder Association (ADDA)
http://www.add.org/
Web site of the world's largest adult ADD organization. The site features a wide variety of informative aricles, a directory of professionals who treat adults with ADD, and other resources.
Attention Deficit Resource Network
http://www.adrn.org/
A guide to ADD resources in the greater Toronto area. Mainly focussed on parents with ADD kids, but it does include some resources for adults who have ADD themselves. Includes a listing of professionals in the Toronto area, though I'm not sure how up to date it is, and a workshop series.
Born to Explore! The Other Side of ADD
http://borntoexplore.org/
A web site exploring alternative views of Attention Deficit Disorder, including ways in which many of its "symptoms" can be viewed as positive traits.
CADDAC (Centre for ADD Advocacy of Canada)
http://www.caddac.ca/
A new organization attempting to represent people with ADD at a national level. There's not much here yet, but it should be interesting to see how it develops.
Toronto ADD Support Network
http://www.addsupport.org
A Toronto-based ADD support group, with monthly meetings for adults with ADD, and a discussion mailing list for both adult ADDers and parents of ADD children.