I think so long as he knows that its cool to be himself, then he can survive a lot. Bullying is something that pretty much every Aspie faces in our lifetime; people are cruel at times, but equally, they aren't the kind of people you would want as friends anyway, now are they?
Thats just my 2p on it. What I've learned (the hard way) is that its far more important to be
you and live
your life. Not what everyone else is doing. School is a horrible place for having to be someone else. What I'd say is encourage him never to lose sight of himself, and how wondereful he is, and how special he is to you, and not to supress what he is... but equally, as a parent, encourage him to recognise that there is a time and a place for some of his stims (i.e. spinning). Thats very hard - one of my stims is that I make up other languages and think/talk about other worlds that I make up in my head when I can't deal with being on campus. Or when I'm upset. I sometimes stare at the sky and want to go home (yes, I'm one of those Aspies with the 'alien' complex

) - but then I think about how fantastic it is that I can be the anthropologist on Mars. I mean I'm 24 now and its taken me a long time to get to this stage, but thats with no family support. I find it really helpful when my friends just laugh if I start spinning or flapping - in fact my girlfriend and I were just in a mall having coffee, talking about Aspergers, and she decided that she was going to start spinning too. In the middle of a busy mall on a Sunday afternoon! And that made me laugh and feel so much more comfortable that I can be around people who don't give a toss, and actually think its kinda cool. She said that she thinks its cool that I can amuse myself for hours with my own little languages and stims - she burst out laughing when I said I was Saturn midspin. Randomness rocks! There will be kids out there who think its cool that your son is a true individual, but for the meantime, be that cool person who doesn't supress him, but guides him.
Also, you
can be an Aspie
and cool. Genuinely cool people don't give a toss what others think of them. The problem is that a lot of younger Aspies feel that because they don't wear the right clothes, have the right hair and say the right things, that they're not cool. Being in fashion and being cool are closely related but they are not the same thing. You can be in fashion, say and do all the right things etc but be a bumbling mess inside that is full of insecurity over how fat you look, whether or not Brad likes you yadda yadda yadda... but
cool people, genuinely cool people, just get on with life. I think that with encouragement, support and respect, a lot more Aspies would be a lot more happy. We rock (sometimes literally

), really, we do.