There really hasn't been any scanning technology that could trace the connections in the brain. An MRI or a CAT scan is great if you have a tumor, burst blood vessel, bullet, or other non-microscopic thing going on in your brain. For all the decades (centuries?) of talk about "brain wiring" we really have had no way to actually see that wiring.
But there's a new technique that's being worked on called "MRI diffusion tensor imaging," which can literally map the wiring (white-matter connections) in the brain. On "60 Minutes" last week they showed a short piece about a doctor who is working on MRI/DTI (it's still new and there are still bugs/problems). He showed a scan of a normal person's brain -- specifically, some isolated part that is involved with language. Then he showed a scan of the same spot that he took of Temple Grandin's brain. It was dramatically different. TG's brain had many more connections to many more areas.
I gather the people developing MRI/DTI are still trying to make sure that they data they get is actually true/correct, so it's still in development. And even after they perfect it it will probably take years for researchers to figure out the patterns and what they mean.
Selected tracts of a normal brain (I can't find any of an autistic brain):

Very interesting, I'm sorry I missed that 60 minutes episode. That image is lovely too.