Adult ADD Symptom:
Symptom checklist
Attention Deficit Disorder Resources
Expert Scorecard
Overall Expert Score
Community Reviews
A very comprehensive self-test. My only complaint is that you have to keep track of your scoring yourself.
A great pre-test to take if you think you may be an adult suffering from ADD. Even if your score doesn't add up to ADD, I'd recommend seeking some professional advice if you think you may have a problem.