I have Aspergers and ADD. When I read autobiographies (most of all by female aspergers) I often think that they have actually at least a mild form of ADD or ADHD, too.
A German doctor (Dr. Helga Simchen) wrote she thinks that Asperger Syndrome should rather be on the AD(H)S spectrum than on the autism spectrum. My personal opinion is: no. They're nevertheless different things.
But what is the current scientific standpoint about AS and AD(H)S?