Update: Nancy Mucklow, the Author of this article, has her own web site and it contains a lot of other good information - You are encouraged to visit it;
Talking Sense: http://www.nancymucklow.com/talkingsense/
I've just read the following article (thanks DietCoke for making me aware of it) and I figured it was worth linking to;
It's in several places on the internet so I've just chosen the best formatted version to link to;
Especially for Grandparents of Children With Asperger Syndrome
By Nancy Mucklow
In any case, the letter is great reading and touches more than a few nerves I've experienced both as a child (from my grandparents) and as a father (from my parents and parents-in-law).
It's worth a read and well worth forwarding onto your aspie's grandparents.