Hi, I'm just trying to get my head around this one myself. My ds1 - who's 8 and has a dx of Aspergers, was also found to have poor visual motor integration recently.
The first time it was an optician who noted he had poor binocular control, despite having better than 20/20 vision. She said this was down to poor muscular control of his eyes and suggested there may be more problems there.
He also did a WISC IV iq test recently and scored poorly on all the visual-motor related subtests, despite scoring very highly on most of the others.
We are in the process of getting him seen by a behavioural optometrist (Association of Behavioural Optometrists - BABO - website here) who should be able to do a full assessment and either arrange some exercises for him to do and/or ascertain whether or not he needs coloured lenses or overlays.
The two WISC subtest scores that were brought down by his visual-motor problems were perceptual reasoning (he scored very highly on the other subtests in this group but poorly on the VM element) and processing speed.
I found this article which suggests a strong link between poor visual motor skills and the ability to 'read' other people - thereby having a direct effect on social skills.
Another site I found suggested its linked to poor handwriting and other fine motor problems such as needle threading, drawing, painting, and using scissors etc.
There's a .pdf document here which is a study of poor visual motor skills in LD children. It explains a bit about the implications and also the benefits of occupational therapy.
Hope that helps a bit. 