W0W.com ran a feature on him which explains much better then I would in writing.
As parents we let our children play MMORPG's back when we were running around Asherons Call. Our kids would watch and hear the tales, naturally they wanted to give it a try. Both of them learned how to touch type and got to have their own adventures. We monitored them quite carefully and used every opportunity to teach them safe interaction skills.
"So where are do you live?" was answered with "Hebian-To in Dereth of course"
"How old are you?" was "level 26 now, should be 27 in a little bit"
Eventually we moved on to a superhero genre game City of Heroes. Connor was old enough to want to play. So we would let him explore the virtual city. Sometimes with surprising results. Once we found him leading a super team in a 'dangerous' warehouse raid, despite them warning him to "slow down" and asking "what are you doing?" he was surprisingly successful.
The group had a laugh to find a five year old Autistic boy was their erstwhile leader. Now it is a standing reward system for our boys, depending upon work done or activity earned. Connor still loves exploring and his ability to get a weaker character to the middle of a very dangerous zone baffles the mind.
The linked blog and write up is a great example of how autism can work.